3120861688 has 16 divisors (see below), whose sum is σ = 6687560880. Its totient is φ = 1337512128.

The previous prime is 3120861677. The next prime is 3120861707. The reversal of 3120861688 is 8861680213.

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, 27864781 + ... + 27864892.

It is an arithmetic number, because the mean of its divisors is an integer number (417972555).

Almost surely, 2^3120861688 is an apocalyptic number.

It is an amenable number.

3120861688 is an abundant number, since it is smaller than the sum of its proper divisors (3566699192).

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

3120861688 is a wasteful number, since it uses less digits than its factorization.

3120861688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55729686 (or 55729682 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 3120861688 is about 55864.6729874972. The cubic root of 3120861688 is about 1461.3632241449.

The spelling of 3120861688 in words is "three billion, one hundred twenty million, eight hundred sixty-one thousand, six hundred eighty-eight".