25640896 has 28 divisors (see below), whose sum is σ = 53876448. Its totient is φ = 12065792.

The previous prime is 25640893. The next prime is 25640903. The reversal of 25640896 is 69804652.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25640893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10696 + ... + 12871.

Almost surely, 2^25640896 is an apocalyptic number.

It is an amenable number.

25640896 is an abundant number, since it is smaller than the sum of its proper divisors (28235552).

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

25640896 is a wasteful number, since it uses less digits than its factorization.

25640896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23596 (or 23586 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 25640896 is about 5063.6840343766. The cubic root of 25640896 is about 294.8793761368.

The spelling of 25640896 in words is "twenty-five million, six hundred forty thousand, eight hundred ninety-six".