78799994 has 32 divisors (see below), whose sum is σ = 148874880. Its totient is φ = 30445632.

The previous prime is 78799993. The next prime is 78799997. The reversal of 78799994 is 49999787.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78799993) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2792 + ... + 12860.

It is an arithmetic number, because the mean of its divisors is an integer number (4652340).

Almost surely, 2^78799994 is an apocalyptic number.

78799994 is a deficient number, since it is larger than the sum of its proper divisors (70074886).

78799994 is a wasteful number, since it uses less digits than its factorization.

78799994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10134.

The product of its digits is 10287648, while the sum is 62.

The square root of 78799994 is about 8876.9360705144. The cubic root of 78799994 is about 428.7216295859.

The spelling of 78799994 in words is "seventy-eight million, seven hundred ninety-nine thousand, nine hundred ninety-four".