87291684 has 36 divisors (see below), whose sum is σ = 221288704. Its totient is φ = 29013552.

The previous prime is 87291661. The next prime is 87291697. The reversal of 87291684 is 48619278.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9909 + ... + 16515.

Almost surely, 2^87291684 is an apocalyptic number.

It is an amenable number.

87291684 is an abundant number, since it is smaller than the sum of its proper divisors (133997020).

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

87291684 is a wasteful number, since it uses less digits than its factorization.

87291684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6984 (or 6979 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 87291684 is about 9343.0018730599. The cubic root of 87291684 is about 443.5994073673.

The spelling of 87291684 in words is "eighty-seven million, two hundred ninety-one thousand, six hundred eighty-four".