78778196 has 12 divisors (see below), whose sum is σ = 157556448. Its totient is φ = 33762072.

The previous prime is 78778129. The next prime is 78778207. The reversal of 78778196 is 69187787.

78778196 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406726 + ... + 1406781.

It is an arithmetic number, because the mean of its divisors is an integer number (13129704).

Almost surely, 2^78778196 is an apocalyptic number.

It is an amenable number.

78778196 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78778196 is a wasteful number, since it uses less digits than its factorization.

78778196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2813518 (or 2813516 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 53.

The square root of 78778196 is about 8875.7081970962. The cubic root of 78778196 is about 428.6820943209.

The spelling of 78778196 in words is "seventy-eight million, seven hundred seventy-eight thousand, one hundred ninety-six".