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87288365 = 5371992371
BaseRepresentation
bin1010011001111…
…10101000101101
320002020201010102
411030332220231
5134321211430
612354520445
72106640013
oct514765055
9202221112
1087288365
11452aa04a
1225296125
1315112928
14b8428b3
1579e3345
hex533ea2d

87288365 has 16 divisors (see below), whose sum is σ = 108163200. Its totient is φ = 67573440.

The previous prime is 87288349. The next prime is 87288367. The reversal of 87288365 is 56388278.

It is not a de Polignac number, because 87288365 - 24 = 87288349 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87288367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35630 + ... + 38000.

It is an arithmetic number, because the mean of its divisors is an integer number (6760200).

Almost surely, 287288365 is an apocalyptic number.

It is an amenable number.

87288365 is a deficient number, since it is larger than the sum of its proper divisors (20874835).

87288365 is a wasteful number, since it uses less digits than its factorization.

87288365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612.

The product of its digits is 645120, while the sum is 47.

The square root of 87288365 is about 9342.8242517988. The cubic root of 87288365 is about 443.5937851247.

The spelling of 87288365 in words is "eighty-seven million, two hundred eighty-eight thousand, three hundred sixty-five".

Divisors: 1 5 37 185 199 995 2371 7363 11855 36815 87727 438635 471829 2359145 17457673 87288365