3129904644 has 24 divisors (see below), whose sum is σ = 7405973568. Its totient is φ = 1028606880.

The previous prime is 3129904633. The next prime is 3129904667. The reversal of 3129904644 is 4464099213.

It is a junction number, because it is equal to n+sod(n) for n = 3129904596 and 3129904605.

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, 1835947 + ... + 1837650.

It is an arithmetic number, because the mean of its divisors is an integer number (308582232).

Almost surely, 2^3129904644 is an apocalyptic number.

It is an amenable number.

3129904644 is an abundant number, since it is smaller than the sum of its proper divisors (4276068924).

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

3129904644 is a wasteful number, since it uses less digits than its factorization.

3129904644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673675 (or 3673673 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 3129904644 is about 55945.5507078087. The cubic root of 3129904644 is about 1462.7733368283.

The spelling of 3129904644 in words is "three billion, one hundred twenty-nine million, nine hundred four thousand, six hundred forty-four".