79220218 has 16 divisors (see below), whose sum is σ = 148152384. Its totient is φ = 30864960.

The previous prime is 79220179. The next prime is 79220243. The reversal of 79220218 is 81202297.

It is a self number, because there is not a number n which added to its sum of digits gives 79220218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257055 + ... + 257362.

It is an arithmetic number, because the mean of its divisors is an integer number (9259524).

Almost surely, 2^79220218 is an apocalyptic number.

79220218 is a deficient number, since it is larger than the sum of its proper divisors (68932166).

79220218 is a wasteful number, since it uses less digits than its factorization.

79220218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514437.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 79220218 is about 8900.5740264322. The cubic root of 79220218 is about 429.4823733541.

The spelling of 79220218 in words is "seventy-nine million, two hundred twenty thousand, two hundred eighteen".