25396638 has 16 divisors (see below), whose sum is σ = 51874560. Its totient is φ = 8285336.

The previous prime is 25396633. The next prime is 25396639. The reversal of 25396638 is 83669352.

It is a super-3 number, since 3×25396638³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25396638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25396633) 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, 44748 + ... + 45311.

It is an arithmetic number, because the mean of its divisors is an integer number (3242160).

Almost surely, 2^25396638 is an apocalyptic number.

25396638 is an abundant number, since it is smaller than the sum of its proper divisors (26477922).

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

25396638 is a wasteful number, since it uses less digits than its factorization.

25396638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90111.

The product of its digits is 233280, while the sum is 42.

The square root of 25396638 is about 5039.5077140530. The cubic root of 25396638 is about 293.9400358987.

The spelling of 25396638 in words is "twenty-five million, three hundred ninety-six thousand, six hundred thirty-eight".