25440856 has 32 divisors (see below), whose sum is σ = 54900000. Its totient is φ = 10826496.

The previous prime is 25440853. The next prime is 25440871. The reversal of 25440856 is 65804452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25440853) 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, 6820 + ... + 9868.

It is an arithmetic number, because the mean of its divisors is an integer number (1715625).

Almost surely, 2^25440856 is an apocalyptic number.

It is an amenable number.

25440856 is an abundant number, since it is smaller than the sum of its proper divisors (29459144).

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

25440856 is a wasteful number, since it uses less digits than its factorization.

25440856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211 (or 3207 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 25440856 is about 5043.8929409733. The cubic root of 25440856 is about 294.1105296536.

The spelling of 25440856 in words is "twenty-five million, four hundred forty thousand, eight hundred fifty-six".