79718220 has 36 divisors (see below), whose sum is σ = 241812480. Its totient is φ = 21258144.

The previous prime is 79718203. The next prime is 79718237. The reversal of 79718220 is 2281797.

It is an interprime number because it is at equal distance from previous prime (79718203) and next prime (79718237).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 221260 + ... + 221619.

Almost surely, 2^79718220 is an apocalyptic number.

It is an amenable number.

79718220 is an abundant number, since it is smaller than the sum of its proper divisors (162094260).

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

79718220 is a wasteful number, since it uses less digits than its factorization.

79718220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442894 (or 442889 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 79718220 is about 8928.5060340462. The cubic root of 79718220 is about 430.3804457035.

The spelling of 79718220 in words is "seventy-nine million, seven hundred eighteen thousand, two hundred twenty".