25250728 has 8 divisors (see below), whose sum is σ = 47345130. Its totient is φ = 12625360.

The previous prime is 25250717. The next prime is 25250777. The reversal of 25250728 is 82705252.

It can be written as a sum of positive squares in only one way, i.e., 21178404 + 4072324 = 4602^2 + 2018^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 25250728.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1578163 + ... + 1578178.

Almost surely, 2^25250728 is an apocalyptic number.

It is an amenable number.

25250728 is a deficient number, since it is larger than the sum of its proper divisors (22094402).

25250728 is a wasteful number, since it uses less digits than its factorization.

25250728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156347 (or 3156343 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 25250728 is about 5025.0102487458. The cubic root of 25250728 is about 293.3760348762.

The spelling of 25250728 in words is "twenty-five million, two hundred fifty thousand, seven hundred twenty-eight".