990 = 1 + 23 × 45 + 6 + 7 × 89
990 = 9 × 8 + 7 + 65 × (4 + 3) × 2 + 1
990 = 0^7 + 1^8 − 2^4 + 3^5 − 4^9 + 5^2 + 6^0 + 7^1 + 8^6 + 9^3
990 divides 89^2 - 1.
990 = (11 − 1 − 1) × (111 − 1)
990 = 2 × 222 + 22
990 = 3 × (333 − 3)
990 = 4 × (44 − 4 − 4) − (4 + 4)/4
990 = (5+5)×(5×(5×5−5)−5/5)
990 = 666 + 6 × (66 − 6 − 6)
990 = (7 + 7 + 7/7) × (77 − 77/7)
990 = 88 × (88 + (8 + 8)/8)/8
990 = 999 − 9
990 = 9 × 10 × 11, Triangular Number , product of 3 consecutive numbers, 44th triangular number.
Number k such that k^8 + 1 is prime (922744694427920100000001)
Factors: 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
Nine hundred ninety
Representations, Binary to Hexadecimal:
1111011110_2
1100200_3
33132_4
12430_5
4330_6
2613_7
1736_8
1320_9
820_11
6a6_12
5b2_13
50a_14
460_15
3de_16
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