3129238220 has 24 divisors (see below), whose sum is σ = 6645240000. Its totient is φ = 1237630592.

The previous prime is 3129238187. The next prime is 3129238249. The reversal of 3129238220 is 228329213.

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, 877220 + ... + 880779.

It is an arithmetic number, because the mean of its divisors is an integer number (276885000).

Almost surely, 2^3129238220 is an apocalyptic number.

It is an amenable number.

3129238220 is an abundant number, since it is smaller than the sum of its proper divisors (3516001780).

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

3129238220 is a wasteful number, since it uses less digits than its factorization.

3129238220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758097 (or 1758095 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 3129238220 is about 55939.5943853725. The cubic root of 3129238220 is about 1462.6695108267.

The spelling of 3129238220 in words is "three billion, one hundred twenty-nine million, two hundred thirty-eight thousand, two hundred twenty".