25604478 has 32 divisors (see below), whose sum is σ = 57330720. Its totient is φ = 8470080.

The previous prime is 25604473. The next prime is 25604507. The reversal of 25604478 is 87440652.

25604478 is a `hidden beast` number, since 2 + 5 + 604 + 47 + 8 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25604471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5668 + ... + 9128.

It is an arithmetic number, because the mean of its divisors is an integer number (1791585).

Almost surely, 2^25604478 is an apocalyptic number.

25604478 is an abundant number, since it is smaller than the sum of its proper divisors (31726242).

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

25604478 is a wasteful number, since it uses less digits than its factorization.

25604478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609 (or 3603 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 25604478 is about 5060.0867581495. The cubic root of 25604478 is about 294.7397033613.

The spelling of 25604478 in words is "twenty-five million, six hundred four thousand, four hundred seventy-eight".