78993834 has 8 divisors (see below), whose sum is σ = 157987680. Its totient is φ = 26331276.

The previous prime is 78993829. The next prime is 78993907. The reversal of 78993834 is 43839987.

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

78993834 is an admirable 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, 6582814 + ... + 6582825.

It is an arithmetic number, because the mean of its divisors is an integer number (19748460).

Almost surely, 2^78993834 is an apocalyptic number.

78993834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78993834 is a wasteful number, since it uses less digits than its factorization.

78993834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13165644.

The product of its digits is 1306368, while the sum is 51.

The square root of 78993834 is about 8887.8475459472. The cubic root of 78993834 is about 429.0728789851.

The spelling of 78993834 in words is "seventy-eight million, nine hundred ninety-three thousand, eight hundred thirty-four".