87031404 has 36 divisors (see below), whose sum is σ = 224681184. Its totient is φ = 28392672.

The previous prime is 87031369. The next prime is 87031423. The reversal of 87031404 is 40413078.

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

It is a super-2 number, since 2×87031404² = 15148930564422432, which contains 22 as substring.

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, 24027 + ... + 27410.

It is an arithmetic number, because the mean of its divisors is an integer number (6241144).

Almost surely, 2^87031404 is an apocalyptic number.

It is an amenable number.

87031404 is an abundant number, since it is smaller than the sum of its proper divisors (137649780).

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

87031404 is a wasteful number, since it uses less digits than its factorization.

87031404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51494 (or 51489 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 87031404 is about 9329.0623323033. The cubic root of 87031404 is about 443.1580709356.

The spelling of 87031404 in words is "eighty-seven million, thirty-one thousand, four hundred four".