78668208 has 60 divisors (see below), whose sum is σ = 231757240. Its totient is φ = 24841728.

The previous prime is 78668203. The next prime is 78668209. The reversal of 78668208 is 80286687.

It is not an unprimeable number, because it can be changed into a prime (78668203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11641 + ... + 17112.

Almost surely, 2^78668208 is an apocalyptic number.

It is an amenable number.

78668208 is an abundant number, since it is smaller than the sum of its proper divisors (153089032).

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

78668208 is a wasteful number, since it uses less digits than its factorization.

78668208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28786 (or 28777 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 78668208 is about 8869.5100202886. The cubic root of 78668208 is about 428.4824965948.

The spelling of 78668208 in words is "seventy-eight million, six hundred sixty-eight thousand, two hundred eight".