78996816 has 80 divisors (see below), whose sum is σ = 229003200. Its totient is φ = 26070912.

The previous prime is 78996787. The next prime is 78996821. The reversal of 78996816 is 61869987.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45370 + ... + 47078.

It is an arithmetic number, because the mean of its divisors is an integer number (2862540).

Almost surely, 2^78996816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78996816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114501600).

78996816 is an abundant number, since it is smaller than the sum of its proper divisors (150006384).

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

78996816 is a wasteful number, since it uses less digits than its factorization.

78996816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1821 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 78996816 is about 8888.0153015170. The cubic root of 78996816 is about 429.0782780531.

The spelling of 78996816 in words is "seventy-eight million, nine hundred ninety-six thousand, eight hundred sixteen".