79646728 has 32 divisors (see below), whose sum is σ = 171777600. Its totient is φ = 33913152.

The previous prime is 79646659. The next prime is 79646729. The reversal of 79646728 is 82764697.

It is a super-2 number, since 2×79646728² = 12687202562211968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (79646729) 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, 4263 + ... + 13321.

It is an arithmetic number, because the mean of its divisors is an integer number (5368050).

Almost surely, 2^79646728 is an apocalyptic number.

It is an amenable number.

79646728 is an abundant number, since it is smaller than the sum of its proper divisors (92130872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79646728 is a wasteful number, since it uses less digits than its factorization.

79646728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9229 (or 9225 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 49.

The square root of 79646728 is about 8924.5015547088. The cubic root of 79646728 is about 430.2517509028.

It can be divided in two parts, 796 and 46728, that added together give a square (47524 = 218²).

The spelling of 79646728 in words is "seventy-nine million, six hundred forty-six thousand, seven hundred twenty-eight".