25057856 has 56 divisors (see below), whose sum is σ = 53766720. Its totient is φ = 11551232.

The previous prime is 25057853. The next prime is 25057873. The reversal of 25057856 is 65875052.

It is a super-2 number, since 2×25057856² = 1255792294633472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (25057853) 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, 42395 + ... + 42981.

It is an arithmetic number, because the mean of its divisors is an integer number (960120).

Almost surely, 2^25057856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25057856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26883360).

25057856 is an abundant number, since it is smaller than the sum of its proper divisors (28708864).

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

25057856 is a wasteful number, since it uses less digits than its factorization.

25057856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 25057856 is about 5005.7822565509. The cubic root of 25057856 is about 292.6271626697.

The spelling of 25057856 in words is "twenty-five million, fifty-seven thousand, eight hundred fifty-six".