87565912 has 64 divisors (see below), whose sum is σ = 202176000. Its totient is φ = 34699776.

The previous prime is 87565901. The next prime is 87565921. The reversal of 87565912 is 21956578.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55389 + ... + 56947.

It is an arithmetic number, because the mean of its divisors is an integer number (3159000).

Almost surely, 2^87565912 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 87565912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101088000).

87565912 is an abundant number, since it is smaller than the sum of its proper divisors (114610088).

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

87565912 is a wasteful number, since it uses less digits than its factorization.

87565912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648 (or 1644 counting only the distinct ones).

The product of its digits is 151200, while the sum is 43.

The square root of 87565912 is about 9357.6659483014. The cubic root of 87565912 is about 444.0634462805.

The spelling of 87565912 in words is "eighty-seven million, five hundred sixty-five thousand, nine hundred twelve".