79820012 has 12 divisors (see below), whose sum is σ = 139921656. Its totient is φ = 39842400.

The previous prime is 79819991. The next prime is 79820023. The reversal of 79820012 is 21002897.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14198 + ... + 19005.

It is an arithmetic number, because the mean of its divisors is an integer number (11660138).

Almost surely, 2^79820012 is an apocalyptic number.

It is an amenable number.

79820012 is a deficient number, since it is larger than the sum of its proper divisors (60101644).

79820012 is a wasteful number, since it uses less digits than its factorization.

79820012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33808 (or 33806 counting only the distinct ones).

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

The square root of 79820012 is about 8934.2046092531. The cubic root of 79820012 is about 430.5635517023.

The spelling of 79820012 in words is "seventy-nine million, eight hundred twenty thousand, twelve".