25645928 has 128 divisors (see below), whose sum is σ = 66355200. Its totient is φ = 8985600.

The previous prime is 25645909. The next prime is 25645937. The reversal of 25645928 is 82954652.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 324593 + ... + 324671.

It is an arithmetic number, because the mean of its divisors is an integer number (518400).

Almost surely, 2^25645928 is an apocalyptic number.

25645928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25645928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33177600).

25645928 is an abundant number, since it is smaller than the sum of its proper divisors (40709272).

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

25645928 is a wasteful number, since it uses less digits than its factorization.

25645928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 147 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 25645928 is about 5064.1808814457. The cubic root of 25645928 is about 294.8986648018.

The spelling of 25645928 in words is "twenty-five million, six hundred forty-five thousand, nine hundred twenty-eight".