79425638 has 4 divisors (see below), whose sum is σ = 119138460. Its totient is φ = 39712818.

The previous prime is 79425617. The next prime is 79425653. The reversal of 79425638 is 83652497.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19856408 + ... + 19856411.

It is an arithmetic number, because the mean of its divisors is an integer number (29784615).

Almost surely, 2^79425638 is an apocalyptic number.

79425638 is a deficient number, since it is larger than the sum of its proper divisors (39712822).

79425638 is a wasteful number, since it uses less digits than its factorization.

79425638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39712821.

The product of its digits is 362880, while the sum is 44.

The square root of 79425638 is about 8912.1062605873. The cubic root of 79425638 is about 429.8532724550.

The spelling of 79425638 in words is "seventy-nine million, four hundred twenty-five thousand, six hundred thirty-eight".