78788831 has 8 divisors (see below), whose sum is σ = 86085504. Its totient is φ = 71514520.

The previous prime is 78788807. The next prime is 78788849. The reversal of 78788831 is 13888787.

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

It is not a de Polignac number, because 78788831 - 2⁶ = 78788767 is a prime.

It is a super-2 number, since 2×78788831² = 12415359780693122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78788831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78788431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2270 + ... + 12756.

It is an arithmetic number, because the mean of its divisors is an integer number (10760688).

Almost surely, 2^78788831 is an apocalyptic number.

78788831 is a deficient number, since it is larger than the sum of its proper divisors (7296673).

78788831 is a wasteful number, since it uses less digits than its factorization.

78788831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11181.

The product of its digits is 602112, while the sum is 50.

The square root of 78788831 is about 8876.3072840005. The cubic root of 78788831 is about 428.7013840447.

The spelling of 78788831 in words is "seventy-eight million, seven hundred eighty-eight thousand, eight hundred thirty-one".