25641936 has 30 divisors (see below), whose sum is σ = 71762210. Its totient is φ = 8547264.

The previous prime is 25641911. The next prime is 25641943. The reversal of 25641936 is 63914652.

It is a happy number.

25641936 is a `hidden beast` number, since 2 + 5 + 641 + 9 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15681600 + 9960336 = 3960^2 + 3156^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 25641936.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88891 + ... + 89178.

Almost surely, 2^25641936 is an apocalyptic number.

It is an amenable number.

25641936 is an abundant number, since it is smaller than the sum of its proper divisors (46120274).

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

25641936 is a wasteful number, since it uses less digits than its factorization.

25641936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178083 (or 178074 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 25641936 is about 5063.7867253667. The cubic root of 25641936 is about 294.8833628722.

The spelling of 25641936 in words is "twenty-five million, six hundred forty-one thousand, nine hundred thirty-six".