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87016680 = 23345107251
BaseRepresentation
bin1010010111111…
…00010011101000
320001201220110000
411023330103220
5134234013210
612345023000
72104425642
oct513742350
9201656400
1087016680
1145133a13
1225184a60
131504907a
14b7b1892
15798cac0
hex52fc4e8

87016680 has 160 divisors (see below), whose sum is σ = 296382240. Its totient is φ = 22896000.

The previous prime is 87016679. The next prime is 87016687. The reversal of 87016680 is 8661078.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (87016687) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 346555 + ... + 346805.

It is an arithmetic number, because the mean of its divisors is an integer number (1852389).

Almost surely, 287016680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87016680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148191120).

87016680 is an abundant number, since it is smaller than the sum of its proper divisors (209365560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87016680 is a wasteful number, since it uses less digits than its factorization.

87016680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 87016680 is about 9328.2731520898. The cubic root of 87016680 is about 443.1330783193.

The spelling of 87016680 in words is "eighty-seven million, sixteen thousand, six hundred eighty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 54 60 72 81 90 107 108 120 135 162 180 214 216 251 270 321 324 360 405 428 502 535 540 642 648 753 810 856 963 1004 1070 1080 1255 1284 1506 1605 1620 1926 2008 2140 2259 2510 2568 2889 3012 3210 3240 3765 3852 4280 4518 4815 5020 5778 6024 6420 6777 7530 7704 8667 9036 9630 10040 11295 11556 12840 13554 14445 15060 17334 18072 19260 20331 22590 23112 26857 27108 28890 30120 33885 34668 38520 40662 43335 45180 53714 54216 57780 67770 69336 80571 81324 86670 90360 101655 107428 115560 134285 135540 161142 162648 173340 203310 214856 241713 268570 271080 322284 346680 402855 406620 483426 537140 644568 725139 805710 813240 966852 1074280 1208565 1450278 1611420 1933704 2175417 2417130 2900556 3222840 3625695 4350834 4834260 5801112 7251390 8701668 9668520 10877085 14502780 17403336 21754170 29005560 43508340 87016680