87731004 has 12 divisors (see below), whose sum is σ = 204705704. Its totient is φ = 29243664.

The previous prime is 87730997. The next prime is 87731011. The reversal of 87731004 is 40013778.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87730997) and next prime (87731011).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3655447 + ... + 3655470.

Almost surely, 2^87731004 is an apocalyptic number.

It is an amenable number.

87731004 is an abundant number, since it is smaller than the sum of its proper divisors (116974700).

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

87731004 is a wasteful number, since it uses less digits than its factorization.

87731004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7310924 (or 7310922 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 87731004 is about 9366.4830112481. The cubic root of 87731004 is about 444.3423420921.

The spelling of 87731004 in words is "eighty-seven million, seven hundred thirty-one thousand, four".