25423636 has 24 divisors (see below), whose sum is σ = 53839296. Its totient is φ = 10254720.

The previous prime is 25423613. The next prime is 25423639. The reversal of 25423636 is 63632452.

It is a happy number.

It is a super-2 number, since 2×25423636² = 1292722534920992, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25423598 and 25423607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25423639) 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 7 ways as a sum of consecutive naturals, for example, 26230 + ... + 27181.

It is an arithmetic number, because the mean of its divisors is an integer number (2243304).

Almost surely, 2^25423636 is an apocalyptic number.

It is an amenable number.

25423636 is an abundant number, since it is smaller than the sum of its proper divisors (28415660).

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

25423636 is a wasteful number, since it uses less digits than its factorization.

25423636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53439 (or 53437 counting only the distinct ones).

The product of its digits is 25920, while the sum is 31.

The square root of 25423636 is about 5042.1856372014. The cubic root of 25423636 is about 294.0441570648.

The spelling of 25423636 in words is "twenty-five million, four hundred twenty-three thousand, six hundred thirty-six".