25783728 has 40 divisors (see below), whose sum is σ = 66805248. Its totient is φ = 8569152.

The previous prime is 25783727. The next prime is 25783733. The reversal of 25783728 is 82738752.

It is a self number, because there is not a number n which added to its sum of digits gives 25783728.

It is not an unprimeable number, because it can be changed into a prime (25783727) 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, 22825 + ... + 23927.

Almost surely, 2^25783728 is an apocalyptic number.

It is an amenable number.

25783728 is an abundant number, since it is smaller than the sum of its proper divisors (41021520).

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

25783728 is a wasteful number, since it uses less digits than its factorization.

25783728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1595 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 25783728 is about 5077.7680136060. The cubic root of 25783728 is about 295.4259020982.

The spelling of 25783728 in words is "twenty-five million, seven hundred eighty-three thousand, seven hundred twenty-eight".