78279994 has 32 divisors (see below), whose sum is σ = 133701120. Its totient is φ = 34100352.

The previous prime is 78279989. The next prime is 78280001. The reversal of 78279994 is 49997287.

It is a super-2 number, since 2×78279994² = 12255514921280072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46414 + ... + 48070.

It is an arithmetic number, because the mean of its divisors is an integer number (4178160).

Almost surely, 2^78279994 is an apocalyptic number.

78279994 is a deficient number, since it is larger than the sum of its proper divisors (55421126).

78279994 is a wasteful number, since it uses less digits than its factorization.

78279994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774.

The product of its digits is 2286144, while the sum is 55.

The square root of 78279994 is about 8847.5982051628. The cubic root of 78279994 is about 427.7765049992.

The spelling of 78279994 in words is "seventy-eight million, two hundred seventy-nine thousand, nine hundred ninety-four".