79821328 has 10 divisors (see below), whose sum is σ = 154653854. Its totient is φ = 39910656.

The previous prime is 79821323. The next prime is 79821331. The reversal of 79821328 is 82312897.

It can be written as a sum of positive squares in only one way, i.e., 78004224 + 1817104 = 8832^2 + 1348^2 .

It is not an unprimeable number, because it can be changed into a prime (79821323) 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 as a sum of consecutive naturals, namely, 2494401 + ... + 2494432.

Almost surely, 2^79821328 is an apocalyptic number.

It is an amenable number.

79821328 is a deficient number, since it is larger than the sum of its proper divisors (74832526).

79821328 is a wasteful number, since it uses less digits than its factorization.

79821328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4988841 (or 4988835 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 79821328 is about 8934.2782584829. The cubic root of 79821328 is about 430.5659179364.

The spelling of 79821328 in words is "seventy-nine million, eight hundred twenty-one thousand, three hundred twenty-eight".