78999718 has 16 divisors (see below), whose sum is σ = 139797504. Its totient is φ = 32764680.

The previous prime is 78999707. The next prime is 78999721. The reversal of 78999718 is 81799987.

It is a congruent number.

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, 90580 + ... + 91447.

It is an arithmetic number, because the mean of its divisors is an integer number (8737344).

Almost surely, 2^78999718 is an apocalyptic number.

78999718 is a deficient number, since it is larger than the sum of its proper divisors (60797786).

78999718 is a wasteful number, since it uses less digits than its factorization.

78999718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182067.

The product of its digits is 2286144, while the sum is 58.

The square root of 78999718 is about 8888.1785535620. The cubic root of 78999718 is about 429.0835321463.

The spelling of 78999718 in words is "seventy-eight million, nine hundred ninety-nine thousand, seven hundred eighteen".