840 = 12 × 3 + 4 + 5 + 6 + 789
840 = 9 × 87 + 6 + 5 + 43 + 2 + 1
840 = 0^7 + 1^8 − 2^9 − 3^6 + 4^5 + 5^4 + 6^1 + 7^3 + 8^0 + 9^2
The ring of integers of the field Q(sqrt(-840)) has class number 8.
Factors: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
Eight hundred forty
Representations, Binary to Hexadecimal:
1101001000_2
1011010_3
31020_4
11330_5
3520_6
2310_7
1510_8
1133_9
6a4_11
5a0_12
4c8_13
440_14
3b0_15
348_16
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