87431916 has 48 divisors (see below), whose sum is σ = 239678208. Its totient is φ = 24456000.

The previous prime is 87431831. The next prime is 87431921. The reversal of 87431916 is 61913478.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23760 + ... + 27191.

It is an arithmetic number, because the mean of its divisors is an integer number (4993296).

Almost surely, 2^87431916 is an apocalyptic number.

It is an amenable number.

87431916 is an abundant number, since it is smaller than the sum of its proper divisors (152246292).

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

87431916 is a wasteful number, since it uses less digits than its factorization.

87431916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50982 (or 50980 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 87431916 is about 9350.5035158541. The cubic root of 87431916 is about 443.8368242196.

The spelling of 87431916 in words is "eighty-seven million, four hundred thirty-one thousand, nine hundred sixteen".