25913638 has 8 divisors (see below), whose sum is σ = 39697632. Its totient is φ = 12681096.

The previous prime is 25913609. The next prime is 25913669. The reversal of 25913638 is 83631952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25913597 and 25913606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137745 + ... + 137932.

It is an arithmetic number, because the mean of its divisors is an integer number (4962204).

Almost surely, 2^25913638 is an apocalyptic number.

25913638 is a deficient number, since it is larger than the sum of its proper divisors (13783994).

25913638 is a wasteful number, since it uses less digits than its factorization.

25913638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275726.

The product of its digits is 38880, while the sum is 37.

The square root of 25913638 is about 5090.5439787905. The cubic root of 25913638 is about 295.9212339118.

The spelling of 25913638 in words is "twenty-five million, nine hundred thirteen thousand, six hundred thirty-eight".