78766992 has 80 divisors (see below), whose sum is σ = 228983360. Its totient is φ = 26244000.

The previous prime is 78766937. The next prime is 78766999. The reversal of 78766992 is 29966787.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (78766999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33867 + ... + 36117.

It is an arithmetic number, because the mean of its divisors is an integer number (2862292).

Almost surely, 2^78766992 is an apocalyptic number.

78766992 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 78766992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114491680).

78766992 is an abundant number, since it is smaller than the sum of its proper divisors (150216368).

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

78766992 is an equidigital number, since it uses as much as digits as its factorization.

78766992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280 (or 2256 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 78766992 is about 8875.0770137504. The cubic root of 78766992 is about 428.6617706690.

The spelling of 78766992 in words is "seventy-eight million, seven hundred sixty-six thousand, nine hundred ninety-two".