25039387928 has 8 divisors (see below), whose sum is σ = 46948852380. Its totient is φ = 12519693960.

The previous prime is 25039387927. The next prime is 25039387949. The reversal of 25039387928 is 82978393052.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25039387927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564961738 + ... + 1564961753.

Almost surely, 2^25039387928 is an apocalyptic number.

It is an amenable number.

25039387928 is a deficient number, since it is larger than the sum of its proper divisors (21909464452).

25039387928 is a wasteful number, since it uses less digits than its factorization.

25039387928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129923497 (or 3129923493 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 25039387928 in words is "twenty-five billion, thirty-nine million, three hundred eighty-seven thousand, nine hundred twenty-eight".