25720632 has 64 divisors (see below), whose sum is σ = 81657600. Its totient is φ = 7348320.

The previous prime is 25720631. The next prime is 25720649. The reversal of 25720632 is 23602752.

25720632 is a `hidden beast` number, since 2 + 5 + 7 + 20 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 25720596 and 25720605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25720631) 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, 6994 + ... + 10017.

It is an arithmetic number, because the mean of its divisors is an integer number (1275900).

Almost surely, 2^25720632 is an apocalyptic number.

It is an amenable number.

25720632 is an abundant number, since it is smaller than the sum of its proper divisors (55936968).

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

25720632 is a wasteful number, since it uses less digits than its factorization.

25720632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17033 (or 17023 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 25720632 is about 5071.5512419772. The cubic root of 25720632 is about 295.1847239104.

The spelling of 25720632 in words is "twenty-five million, seven hundred twenty thousand, six hundred thirty-two".