25630530 has 16 divisors (see below), whose sum is σ = 61513344. Its totient is φ = 6834800.

The previous prime is 25630513. The next prime is 25630559. The reversal of 25630530 is 3503652.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25630530.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427146 + ... + 427205.

It is an arithmetic number, because the mean of its divisors is an integer number (3844584).

Almost surely, 2^25630530 is an apocalyptic number.

25630530 is an abundant number, since it is smaller than the sum of its proper divisors (35882814).

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

25630530 is a wasteful number, since it uses less digits than its factorization.

25630530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854361.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 25630530 is about 5062.6603678303. The cubic root of 25630530 is about 294.8396332247.

The spelling of 25630530 in words is "twenty-five million, six hundred thirty thousand, five hundred thirty".