79220018 has 16 divisors (see below), whose sum is σ = 122744160. Its totient is φ = 38322816.

The previous prime is 79220003. The next prime is 79220021. The reversal of 79220018 is 81002297.

It is a happy number.

It is a super-2 number, since 2×79220018² = 12551622503840648, which contains 22 as substring.

It is an unprimeable number.

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, 4898 + ... + 13506.

It is an arithmetic number, because the mean of its divisors is an integer number (7671510).

Almost surely, 2^79220018 is an apocalyptic number.

79220018 is a deficient number, since it is larger than the sum of its proper divisors (43524142).

79220018 is a wasteful number, since it uses less digits than its factorization.

79220018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8761.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 79220018 is about 8900.5627911947. The cubic root of 79220018 is about 429.4820119289.

The spelling of 79220018 in words is "seventy-nine million, two hundred twenty thousand, eighteen".