25697856 has 28 divisors (see below), whose sum is σ = 67992752. Its totient is φ = 8565888.

The previous prime is 25697827. The next prime is 25697873. The reversal of 25697856 is 65879652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 66730 + ... + 67113.

Almost surely, 2^25697856 is an apocalyptic number.

It is an amenable number.

25697856 is an abundant number, since it is smaller than the sum of its proper divisors (42294896).

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

25697856 is a wasteful number, since it uses less digits than its factorization.

25697856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133858 (or 133848 counting only the distinct ones).

The product of its digits is 907200, while the sum is 48.

The square root of 25697856 is about 5069.3052778463. The cubic root of 25697856 is about 295.0975680333.

The spelling of 25697856 in words is "twenty-five million, six hundred ninety-seven thousand, eight hundred fifty-six".