79220780 has 12 divisors (see below), whose sum is σ = 166363680. Its totient is φ = 31688304.

The previous prime is 79220759. The next prime is 79220789. The reversal of 79220780 is 8702297.

It is a self number, because there is not a number n which added to its sum of digits gives 79220780.

It is not an unprimeable number, because it can be changed into a prime (79220789) 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 3 ways as a sum of consecutive naturals, for example, 1980500 + ... + 1980539.

It is an arithmetic number, because the mean of its divisors is an integer number (13863640).

Almost surely, 2^79220780 is an apocalyptic number.

It is an amenable number.

79220780 is an abundant number, since it is smaller than the sum of its proper divisors (87142900).

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

79220780 is a wasteful number, since it uses less digits than its factorization.

79220780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961048 (or 3961046 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 79220780 is about 8900.6055973737. The cubic root of 79220780 is about 429.4833889556.

The spelling of 79220780 in words is "seventy-nine million, two hundred twenty thousand, seven hundred eighty".