25638628 has 12 divisors (see below), whose sum is σ = 44903152. Its totient is φ = 12809160.

The previous prime is 25638607. The next prime is 25638631. The reversal of 25638628 is 82683652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8023 + ... + 10753.

Almost surely, 2^25638628 is an apocalyptic number.

It is an amenable number.

25638628 is a deficient number, since it is larger than the sum of its proper divisors (19264524).

25638628 is a wasteful number, since it uses less digits than its factorization.

25638628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082 (or 5080 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 25638628 is about 5063.4600818018. The cubic root of 25638628 is about 294.8706816129.

The spelling of 25638628 in words is "twenty-five million, six hundred thirty-eight thousand, six hundred twenty-eight".