79780220 has 24 divisors (see below), whose sum is σ = 180426624. Its totient is φ = 29457216.

The previous prime is 79780193. The next prime is 79780229. The reversal of 79780220 is 2208797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79780229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153164 + ... + 153683.

It is an arithmetic number, because the mean of its divisors is an integer number (7517776).

Almost surely, 2^79780220 is an apocalyptic number.

It is an amenable number.

79780220 is an abundant number, since it is smaller than the sum of its proper divisors (100646404).

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

79780220 is a wasteful number, since it uses less digits than its factorization.

79780220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306869 (or 306867 counting only the distinct ones).

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

The square root of 79780220 is about 8931.9773846557. The cubic root of 79780220 is about 430.4919913994.

The spelling of 79780220 in words is "seventy-nine million, seven hundred eighty thousand, two hundred twenty".