78799012 has 24 divisors (see below), whose sum is σ = 152361216. Its totient is φ = 35468928.

The previous prime is 78799009. The next prime is 78799031. The reversal of 78799012 is 21099787.

It is a happy number.

It is a super-2 number, since 2×78799012² = 12418568584352288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78799012.

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, 23628 + ... + 26755.

It is an arithmetic number, because the mean of its divisors is an integer number (6348384).

Almost surely, 2^78799012 is an apocalyptic number.

It is an amenable number.

78799012 is a deficient number, since it is larger than the sum of its proper divisors (73562204).

78799012 is a wasteful number, since it uses less digits than its factorization.

78799012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50427 (or 50425 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 78799012 is about 8876.8807584647. The cubic root of 78799012 is about 428.7198486788.

It can be divided in two parts, 787 and 99012, that added together give a palindrome (99799).

The spelling of 78799012 in words is "seventy-eight million, seven hundred ninety-nine thousand, twelve".