78910992 has 60 divisors (see below), whose sum is σ = 224164720. Its totient is φ = 25907904.

The previous prime is 78910987. The next prime is 78911017. The reversal of 78910992 is 29901987.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5559 + ... + 13737.

Almost surely, 2^78910992 is an apocalyptic number.

78910992 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78910992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112082360).

78910992 is an abundant number, since it is smaller than the sum of its proper divisors (145253728).

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

78910992 is a wasteful number, since it uses less digits than its factorization.

78910992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260 (or 8251 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 78910992 is about 8883.1859149744. The cubic root of 78910992 is about 428.9228348340.

It can be divided in two parts, 789 and 10992, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 78910992 in words is "seventy-eight million, nine hundred ten thousand, nine hundred ninety-two".