79728356 has 24 divisors (see below), whose sum is σ = 143101056. Its totient is φ = 38849760.

The previous prime is 79728349. The next prime is 79728359. The reversal of 79728356 is 65382797.

It is a super-2 number, since 2×79728356² = 12713221500925472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 79728356.

It is not an unprimeable number, because it can be changed into a prime (79728359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51311 + ... + 52841.

It is an arithmetic number, because the mean of its divisors is an integer number (5962544).

Almost surely, 2^79728356 is an apocalyptic number.

It is an amenable number.

79728356 is a deficient number, since it is larger than the sum of its proper divisors (63372700).

79728356 is a wasteful number, since it uses less digits than its factorization.

79728356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859 (or 1857 counting only the distinct ones).

The product of its digits is 635040, while the sum is 47.

The square root of 79728356 is about 8929.0736361618. The cubic root of 79728356 is about 430.3986855794.

The spelling of 79728356 in words is "seventy-nine million, seven hundred twenty-eight thousand, three hundred fifty-six".