78993814 has 8 divisors (see below), whose sum is σ = 118814688. Its totient is φ = 39388920.

The previous prime is 78993809. The next prime is 78993823. The reversal of 78993814 is 41839987.

It is a happy number.

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

It is a congruent number.

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, 53077 + ... + 54544.

It is an arithmetic number, because the mean of its divisors is an integer number (14851836).

Almost surely, 2^78993814 is an apocalyptic number.

78993814 is a deficient number, since it is larger than the sum of its proper divisors (39820874).

78993814 is a wasteful number, since it uses less digits than its factorization.

78993814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107990.

The product of its digits is 435456, while the sum is 49.

The square root of 78993814 is about 8887.8464208153. The cubic root of 78993814 is about 429.0728427736.

The spelling of 78993814 in words is "seventy-eight million, nine hundred ninety-three thousand, eight hundred fourteen".