3129991704 has 48 divisors (see below), whose sum is σ = 9688071120. Its totient is φ = 894283200.

The previous prime is 3129991661. The next prime is 3129991729. The reversal of 3129991704 is 4071999213.

3129991704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3129991704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3104647 + ... + 3105654.

It is an arithmetic number, because the mean of its divisors is an integer number (201834815).

Almost surely, 2^3129991704 is an apocalyptic number.

It is an amenable number.

3129991704 is an abundant number, since it is smaller than the sum of its proper divisors (6558079416).

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

3129991704 is a wasteful number, since it uses less digits than its factorization.

3129991704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210320 (or 6210313 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 3129991704 is about 55946.3287803588. The cubic root of 3129991704 is about 1462.7868993145.

The spelling of 3129991704 in words is "three billion, one hundred twenty-nine million, nine hundred ninety-one thousand, seven hundred four".