25640682 has 16 divisors (see below), whose sum is σ = 51341472. Its totient is φ = 8536880.

The previous prime is 25640677. The next prime is 25640683. The reversal of 25640682 is 28604652.

It is not an unprimeable number, because it can be changed into a prime (25640683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4588 + ... + 8504.

It is an arithmetic number, because the mean of its divisors is an integer number (3208842).

Almost surely, 2^25640682 is an apocalyptic number.

25640682 is an abundant number, since it is smaller than the sum of its proper divisors (25700790).

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

25640682 is a wasteful number, since it uses less digits than its factorization.

25640682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5013.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 25640682 is about 5063.6629034721. The cubic root of 25640682 is about 294.8785557759.

The spelling of 25640682 in words is "twenty-five million, six hundred forty thousand, six hundred eighty-two".