25653630 has 32 divisors (see below), whose sum is σ = 62492544. Its totient is φ = 6738336.

The previous prime is 25653623. The next prime is 25653631. The reversal of 25653630 is 3635652.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25653631) 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, 4372 + ... + 8391.

It is an arithmetic number, because the mean of its divisors is an integer number (1952892).

Almost surely, 2^25653630 is an apocalyptic number.

25653630 is an abundant number, since it is smaller than the sum of its proper divisors (36838914).

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

25653630 is a wasteful number, since it uses less digits than its factorization.

25653630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12840.

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 25653630 is about 5064.9412632330. The cubic root of 25653630 is about 294.9281832265.

The spelling of 25653630 in words is "twenty-five million, six hundred fifty-three thousand, six hundred thirty".