25697328 has 20 divisors (see below), whose sum is σ = 66384888. Its totient is φ = 8565760.

The previous prime is 25697323. The next prime is 25697333. The reversal of 25697328 is 82379652.

It is an interprime number because it is at equal distance from previous prime (25697323) and next prime (25697333).

It is a self number, because there is not a number n which added to its sum of digits gives 25697328.

It is not an unprimeable number, because it can be changed into a prime (25697323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267633 + ... + 267728.

Almost surely, 2^25697328 is an apocalyptic number.

It is an amenable number.

25697328 is an abundant number, since it is smaller than the sum of its proper divisors (40687560).

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

25697328 is a wasteful number, since it uses less digits than its factorization.

25697328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535372 (or 535366 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 25697328 is about 5069.2531994368. The cubic root of 25697328 is about 295.0955469492.

The spelling of 25697328 in words is "twenty-five million, six hundred ninety-seven thousand, three hundred twenty-eight".