25644668 has 12 divisors (see below), whose sum is σ = 51289392. Its totient is φ = 10990560.

The previous prime is 25644667. The next prime is 25644677. The reversal of 25644668 is 86644652.

25644668 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25644667) 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, 457913 + ... + 457968.

It is an arithmetic number, because the mean of its divisors is an integer number (4274116).

Almost surely, 2^25644668 is an apocalyptic number.

25644668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25644668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25644668 is a wasteful number, since it uses less digits than its factorization.

25644668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915892 (or 915890 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 25644668 is about 5064.0564767783. The cubic root of 25644668 is about 294.8938352060.

The spelling of 25644668 in words is "twenty-five million, six hundred forty-four thousand, six hundred sixty-eight".