87038831 has 16 divisors (see below), whose sum is σ = 102504960. Its totient is φ = 73069920.

The previous prime is 87038807. The next prime is 87038839. The reversal of 87038831 is 13883078.

It is a de Polignac number, because none of the positive numbers 2^k-87038831 is a prime.

It is a super-2 number, since 2×87038831² = 15151516203693122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87038839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1406 + ... + 13268.

It is an arithmetic number, because the mean of its divisors is an integer number (6406560).

Almost surely, 2^87038831 is an apocalyptic number.

87038831 is a deficient number, since it is larger than the sum of its proper divisors (15466129).

87038831 is a wasteful number, since it uses less digits than its factorization.

87038831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11926.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 87038831 is about 9329.4603809652. The cubic root of 87038831 is about 443.1706765056.

The spelling of 87038831 in words is "eighty-seven million, thirty-eight thousand, eight hundred thirty-one".