25573728 has 48 divisors (see below), whose sum is σ = 67447296. Its totient is φ = 8484480.

The previous prime is 25573663. The next prime is 25573733. The reversal of 25573728 is 82737552.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25525 + ... + 26507.

It is an arithmetic number, because the mean of its divisors is an integer number (1405152).

Almost surely, 2^25573728 is an apocalyptic number.

It is an amenable number.

25573728 is an abundant number, since it is smaller than the sum of its proper divisors (41873568).

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

25573728 is a wasteful number, since it uses less digits than its factorization.

25573728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1259 counting only the distinct ones).

The product of its digits is 117600, while the sum is 39.

The square root of 25573728 is about 5057.0473598732. The cubic root of 25573728 is about 294.6216657208.

The spelling of 25573728 in words is "twenty-five million, five hundred seventy-three thousand, seven hundred twenty-eight".