25538928 has 20 divisors (see below), whose sum is σ = 65975688. Its totient is φ = 8512960.

The previous prime is 25538927. The next prime is 25538959. The reversal of 25538928 is 82983552.

It is a self number, because there is not a number n which added to its sum of digits gives 25538928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25538923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265983 + ... + 266078.

Almost surely, 2^25538928 is an apocalyptic number.

It is an amenable number.

25538928 is an abundant number, since it is smaller than the sum of its proper divisors (40436760).

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

25538928 is a wasteful number, since it uses less digits than its factorization.

25538928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532072 (or 532066 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 25538928 is about 5053.6054456200. The cubic root of 25538928 is about 294.4879674704.

The spelling of 25538928 in words is "twenty-five million, five hundred thirty-eight thousand, nine hundred twenty-eight".