79972028 has 6 divisors (see below), whose sum is σ = 139951056. Its totient is φ = 39986012.

The previous prime is 79972003. The next prime is 79972043. The reversal of 79972028 is 82027997.

It is a self number, because there is not a number n which added to its sum of digits gives 79972028.

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, 9996500 + ... + 9996507.

It is an arithmetic number, because the mean of its divisors is an integer number (23325176).

Almost surely, 2^79972028 is an apocalyptic number.

It is an amenable number.

79972028 is a deficient number, since it is larger than the sum of its proper divisors (59979028).

79972028 is a wasteful number, since it uses less digits than its factorization.

79972028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19993011 (or 19993009 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 79972028 is about 8942.7080909532. The cubic root of 79972028 is about 430.8367122795.

It can be divided in two parts, 799 and 72028, that added together give a palindrome (72827).

The spelling of 79972028 in words is "seventy-nine million, nine hundred seventy-two thousand, twenty-eight".