78868456 has 16 divisors (see below), whose sum is σ = 148235940. Its totient is φ = 39338880.

The previous prime is 78868453. The next prime is 78868477. The reversal of 78868456 is 65486887.

It can be written as a sum of positive squares in 2 ways, for example, as 67076100 + 11792356 = 8190^2 + 3434^2 .

It is not an unprimeable number, because it can be changed into a prime (78868453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8341 + ... + 15076.

Almost surely, 2^78868456 is an apocalyptic number.

It is an amenable number.

78868456 is a deficient number, since it is larger than the sum of its proper divisors (69367484).

78868456 is a wasteful number, since it uses less digits than its factorization.

78868456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23844 (or 23840 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 78868456 is about 8880.7914061755. The cubic root of 78868456 is about 428.8457524555.

The spelling of 78868456 in words is "seventy-eight million, eight hundred sixty-eight thousand, four hundred fifty-six".