25605630 has 24 divisors (see below), whose sum is σ = 66574872. Its totient is φ = 6828144.

The previous prime is 25605589. The next prime is 25605649. The reversal of 25605630 is 3650652.

25605630 is a `hidden beast` number, since 25 + 6 + 0 + 5 + 630 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25605594 and 25605603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142164 + ... + 142343.

It is an arithmetic number, because the mean of its divisors is an integer number (2773953).

Almost surely, 2^25605630 is an apocalyptic number.

25605630 is an abundant number, since it is smaller than the sum of its proper divisors (40969242).

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

25605630 is a wasteful number, since it uses less digits than its factorization.

25605630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284520 (or 284517 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 25605630 is about 5060.2005889095. The cubic root of 25605630 is about 294.7441236173.

The spelling of 25605630 in words is "twenty-five million, six hundred five thousand, six hundred thirty".