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87108356 = 2221777089
BaseRepresentation
bin1010011000100…
…10101100000100
320001220120012102
411030102230010
5134244431411
612351011232
72105260136
oct514225404
9201816172
1087108356
1145196885
1225209b18
131507ba0a
14b7d7056
1579a9d3b
hex5312b04

87108356 has 6 divisors (see below), whose sum is σ = 152439630. Its totient is φ = 43554176.

The previous prime is 87108353. The next prime is 87108443. The reversal of 87108356 is 65380178.

It can be written as a sum of positive squares in only one way, i.e., 85192900 + 1915456 = 9230^2 + 1384^2 .

It is not an unprimeable number, because it can be changed into a prime (87108353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10888541 + ... + 10888548.

It is an arithmetic number, because the mean of its divisors is an integer number (25406605).

Almost surely, 287108356 is an apocalyptic number.

It is an amenable number.

87108356 is a deficient number, since it is larger than the sum of its proper divisors (65331274).

87108356 is a wasteful number, since it uses less digits than its factorization.

87108356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21777093 (or 21777091 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 87108356 is about 9333.1857369282. The cubic root of 87108356 is about 443.2886439335.

The spelling of 87108356 in words is "eighty-seven million, one hundred eight thousand, three hundred fifty-six".

Divisors: 1 2 4 21777089 43554178 87108356