79728603420 has 24 divisors (see below), whose sum is σ = 223240089744. Its totient is φ = 21260960896.

The previous prime is 79728603407. The next prime is 79728603421. The reversal of 79728603420 is 2430682797.

It is a self number, because there is not a number n which added to its sum of digits gives 79728603420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79728603421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664404969 + ... + 664405088.

It is an arithmetic number, because the mean of its divisors is an integer number (9301670406).

Almost surely, 2^79728603420 is an apocalyptic number.

It is an amenable number.

79728603420 is an abundant number, since it is smaller than the sum of its proper divisors (143511486324).

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

79728603420 is a wasteful number, since it uses less digits than its factorization.

79728603420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328810069 (or 1328810067 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The spelling of 79728603420 in words is "seventy-nine billion, seven hundred twenty-eight million, six hundred three thousand, four hundred twenty".