87158900 has 18 divisors (see below), whose sum is σ = 189135030. Its totient is φ = 34863520.

The previous prime is 87158867. The next prime is 87158917. The reversal of 87158900 is 985178.

It can be written as a sum of positive squares in 3 ways, for example, as 35344 + 87123556 = 188^2 + 9334^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 435695 + ... + 435894.

Almost surely, 2^87158900 is an apocalyptic number.

It is an amenable number.

87158900 is an abundant number, since it is smaller than the sum of its proper divisors (101976130).

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

87158900 is a wasteful number, since it uses less digits than its factorization.

87158900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871603 (or 871596 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 87158900 is about 9335.8931013589. The cubic root of 87158900 is about 443.3743657099.

The spelling of 87158900 in words is "eighty-seven million, one hundred fifty-eight thousand, nine hundred".