25651968 has 72 divisors (see below), whose sum is σ = 69070848. Its totient is φ = 8451072.

The previous prime is 25651943. The next prime is 25651987. The reversal of 25651968 is 86915652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97405 + ... + 97667.

Almost surely, 2^25651968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25651968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34535424).

25651968 is an abundant number, since it is smaller than the sum of its proper divisors (43418880).

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

25651968 is a wasteful number, since it uses less digits than its factorization.

25651968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 395 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 25651968 is about 5064.7771915455. Note that the first 3 decimals coincide. The cubic root of 25651968 is about 294.9218140014.

The spelling of 25651968 in words is "twenty-five million, six hundred fifty-one thousand, nine hundred sixty-eight".