78566208 has 112 divisors (see below), whose sum is σ = 242620800. Its totient is φ = 22428672.

The previous prime is 78566179. The next prime is 78566221. The reversal of 78566208 is 80266587.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 78566208.

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, 65260 + ... + 66452.

Almost surely, 2^78566208 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 78566208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121310400).

78566208 is an abundant number, since it is smaller than the sum of its proper divisors (164054592).

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

78566208 is a wasteful number, since it uses less digits than its factorization.

78566208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1205 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 78566208 is about 8863.7581194435. The cubic root of 78566208 is about 428.2972285407.

The spelling of 78566208 in words is "seventy-eight million, five hundred sixty-six thousand, two hundred eight".