78636994 has 8 divisors (see below), whose sum is σ = 118312848. Its totient is φ = 39199380.

The previous prime is 78636989. The next prime is 78637043. The reversal of 78636994 is 49963687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×78636994³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58732 + ... + 60055.

It is an arithmetic number, because the mean of its divisors is an integer number (14789106).

Almost surely, 2^78636994 is an apocalyptic number.

78636994 is a deficient number, since it is larger than the sum of its proper divisors (39675854).

78636994 is a wasteful number, since it uses less digits than its factorization.

78636994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119120.

The product of its digits is 1959552, while the sum is 52.

The square root of 78636994 is about 8867.7502220123. The cubic root of 78636994 is about 428.4258179512.

The spelling of 78636994 in words is "seventy-eight million, six hundred thirty-six thousand, nine hundred ninety-four".