25071728 has 20 divisors (see below), whose sum is σ = 52992888. Its totient is φ = 11396160.

The previous prime is 25071713. The next prime is 25071731. The reversal of 25071728 is 82717052.

It is a junction number, because it is equal to n+sod(n) for n = 25071694 and 25071703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71051 + ... + 71402.

Almost surely, 2^25071728 is an apocalyptic number.

It is an amenable number.

25071728 is an abundant number, since it is smaller than the sum of its proper divisors (27921160).

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

25071728 is a wasteful number, since it uses less digits than its factorization.

25071728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142472 (or 142466 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 25071728 is about 5007.1676624615. The cubic root of 25071728 is about 292.6811520606.

It can be divided in two parts, 2507 and 1728, that multiplied together give a triangular number (4332096 = T₂₉₄₃).

The spelling of 25071728 in words is "twenty-five million, seventy-one thousand, seven hundred twenty-eight".