78512794 has 16 divisors (see below), whose sum is σ = 119883456. Its totient is φ = 38556000.

The previous prime is 78512789. The next prime is 78512821. The reversal of 78512794 is 49721587.

It is a self number, because there is not a number n which added to its sum of digits gives 78512794.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42694 + ... + 44494.

It is an arithmetic number, because the mean of its divisors is an integer number (7492716).

Almost surely, 2^78512794 is an apocalyptic number.

78512794 is a deficient number, since it is larger than the sum of its proper divisors (41370662).

78512794 is a wasteful number, since it uses less digits than its factorization.

78512794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181.

The product of its digits is 141120, while the sum is 43.

The square root of 78512794 is about 8860.7445511086. The cubic root of 78512794 is about 428.2001458589.

The spelling of 78512794 in words is "seventy-eight million, five hundred twelve thousand, seven hundred ninety-four".