31234008728 has 32 divisors (see below), whose sum is σ = 64535394000. Its totient is φ = 14080445568.

The previous prime is 31234008703. The next prime is 31234008733. The reversal of 31234008728 is 82780043213.

It is a super-3 number, since 3×31234008728³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31234008691 and 31234008700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3487703 + ... + 3496646.

Almost surely, 2^31234008728 is an apocalyptic number.

It is an amenable number.

31234008728 is an abundant number, since it is smaller than the sum of its proper divisors (33301385272).

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

31234008728 is a wasteful number, since it uses less digits than its factorization.

31234008728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984411 (or 6984407 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 31234008728 in words is "thirty-one billion, two hundred thirty-four million, eight thousand, seven hundred twenty-eight".