25697408 has 32 divisors (see below), whose sum is σ = 55851120. Its totient is φ = 11680000.

The previous prime is 25697407. The next prime is 25697411. The reversal of 25697408 is 80479652.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (25697407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7718 + ... + 10533.

Almost surely, 2^25697408 is an apocalyptic number.

It is an amenable number.

25697408 is an abundant number, since it is smaller than the sum of its proper divisors (30153712).

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

25697408 is a wasteful number, since it uses less digits than its factorization.

25697408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18276 (or 18264 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 25697408 is about 5069.2610901393. The cubic root of 25697408 is about 295.0958531759.

The spelling of 25697408 in words is "twenty-five million, six hundred ninety-seven thousand, four hundred eight".