25990644 has 24 divisors (see below), whose sum is σ = 63282240. Its totient is φ = 8286784.

The previous prime is 25990631. The next prime is 25990661. The reversal of 25990644 is 44609952.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 46809 + ... + 47360.

It is an arithmetic number, because the mean of its divisors is an integer number (2636760).

Almost surely, 2^25990644 is an apocalyptic number.

It is an amenable number.

25990644 is an abundant number, since it is smaller than the sum of its proper divisors (37291596).

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

25990644 is a wasteful number, since it uses less digits than its factorization.

25990644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94199 (or 94197 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 25990644 is about 5098.1019997642. The cubic root of 25990644 is about 296.2140678170.

The spelling of 25990644 in words is "twenty-five million, nine hundred ninety thousand, six hundred forty-four".