79420156 has 12 divisors (see below), whose sum is σ = 139692168. Its totient is φ = 39508112.

The previous prime is 79420153. The next prime is 79420181. The reversal of 79420156 is 65102497.

It is a super-2 number, since 2×79420156² = 12615122358128672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79420153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49606 + ... + 51181.

It is an arithmetic number, because the mean of its divisors is an integer number (11641014).

Almost surely, 2^79420156 is an apocalyptic number.

It is an amenable number.

79420156 is a deficient number, since it is larger than the sum of its proper divisors (60272012).

79420156 is a wasteful number, since it uses less digits than its factorization.

79420156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100988 (or 100986 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 79420156 is about 8911.7986961107. The cubic root of 79420156 is about 429.8433826599.

The spelling of 79420156 in words is "seventy-nine million, four hundred twenty thousand, one hundred fifty-six".