2539138904 has 32 divisors (see below), whose sum is σ = 5148204480. Its totient is φ = 1169462784.

The previous prime is 2539138873. The next prime is 2539138907. The reversal of 2539138904 is 4098319352.

2539138904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2539138907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192227 + ... + 205010.

It is an arithmetic number, because the mean of its divisors is an integer number (160881390).

Almost surely, 2^2539138904 is an apocalyptic number.

It is an amenable number.

2539138904 is an abundant number, since it is smaller than the sum of its proper divisors (2609065576).

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

2539138904 is a wasteful number, since it uses less digits than its factorization.

2539138904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397307 (or 397303 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 2539138904 is about 50389.8690611516. The cubic root of 2539138904 is about 1364.2547876738.

The spelling of 2539138904 in words is "two billion, five hundred thirty-nine million, one hundred thirty-eight thousand, nine hundred four".