25648634 has 32 divisors (see below), whose sum is σ = 44198784. Its totient is φ = 11049280.

The previous prime is 25648633. The next prime is 25648639. The reversal of 25648634 is 43684652.

It is not an unprimeable number, because it can be changed into a prime (25648633) 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, 87392 + ... + 87684.

It is an arithmetic number, because the mean of its divisors is an integer number (1381212).

Almost surely, 2^25648634 is an apocalyptic number.

25648634 is a deficient number, since it is larger than the sum of its proper divisors (18550150).

25648634 is a wasteful number, since it uses less digits than its factorization.

25648634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502.

The product of its digits is 138240, while the sum is 38.

The square root of 25648634 is about 5064.4480449502. The cubic root of 25648634 is about 294.9090363992.

The spelling of 25648634 in words is "twenty-five million, six hundred forty-eight thousand, six hundred thirty-four".