78197568 has 56 divisors (see below), whose sum is σ = 208544160. Its totient is φ = 25858560.

The previous prime is 78197549. The next prime is 78197573. The reversal of 78197568 is 86579187.

It is a super-2 number, since 2×78197568² = 12229719282229248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78197568.

It is a congruent number.

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, 23598 + ... + 26706.

Almost surely, 2^78197568 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 78197568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104272080).

78197568 is an abundant number, since it is smaller than the sum of its proper divisors (130346592).

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

78197568 is a wasteful number, since it uses less digits than its factorization.

78197568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3255 (or 3245 counting only the distinct ones).

The product of its digits is 846720, while the sum is 51.

The square root of 78197568 is about 8842.9388779975. The cubic root of 78197568 is about 427.6263078780.

The spelling of 78197568 in words is "seventy-eight million, one hundred ninety-seven thousand, five hundred sixty-eight".