25971728 has 10 divisors (see below), whose sum is σ = 50320254. Its totient is φ = 12985856.

The previous prime is 25971703. The next prime is 25971739. The reversal of 25971728 is 82717952.

It can be written as a sum of positive squares in only one way, i.e., 25928464 + 43264 = 5092^2 + 208^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811601 + ... + 811632.

Almost surely, 2^25971728 is an apocalyptic number.

It is an amenable number.

25971728 is a deficient number, since it is larger than the sum of its proper divisors (24348526).

25971728 is a wasteful number, since it uses less digits than its factorization.

25971728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623241 (or 1623235 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 25971728 is about 5096.2464618580. The cubic root of 25971728 is about 296.1421888082.

The spelling of 25971728 in words is "twenty-five million, nine hundred seventy-one thousand, seven hundred twenty-eight".