78802856 has 32 divisors (see below), whose sum is σ = 163144800. Its totient is φ = 35384640.

The previous prime is 78802847. The next prime is 78802873. The reversal of 78802856 is 65820887.

It is a super-2 number, since 2×78802856² = 12419780227513472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1910 + ... + 12698.

It is an arithmetic number, because the mean of its divisors is an integer number (5098275).

Almost surely, 2^78802856 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 78802856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81572400).

78802856 is an abundant number, since it is smaller than the sum of its proper divisors (84341944).

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

78802856 is a wasteful number, since it uses less digits than its factorization.

78802856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10889 (or 10885 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 78802856 is about 8877.0972733208. The cubic root of 78802856 is about 428.7268198843.

The spelling of 78802856 in words is "seventy-eight million, eight hundred two thousand, eight hundred fifty-six".