79397728 has 12 divisors (see below), whose sum is σ = 156314340. Its totient is φ = 39698848.

The previous prime is 79397707. The next prime is 79397743. The reversal of 79397728 is 82779397.

It is a happy number.

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, 1240558 + ... + 1240621.

It is an arithmetic number, because the mean of its divisors is an integer number (13026195).

Almost surely, 2^79397728 is an apocalyptic number.

It is an amenable number.

79397728 is a deficient number, since it is larger than the sum of its proper divisors (76916612).

79397728 is a wasteful number, since it uses less digits than its factorization.

79397728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481189 (or 2481181 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 52.

The square root of 79397728 is about 8910.5402754266. The cubic root of 79397728 is about 429.8029167148.

The spelling of 79397728 in words is "seventy-nine million, three hundred ninety-seven thousand, seven hundred twenty-eight".