78938156 has 12 divisors (see below), whose sum is σ = 150700200. Its totient is φ = 35880960.

The previous prime is 78938149. The next prime is 78938159. The reversal of 78938156 is 65183987.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78938156.

It is not an unprimeable number, because it can be changed into a prime (78938159) 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, 896981 + ... + 897068.

It is an arithmetic number, because the mean of its divisors is an integer number (12558350).

Almost surely, 2^78938156 is an apocalyptic number.

It is an amenable number.

78938156 is a deficient number, since it is larger than the sum of its proper divisors (71762044).

78938156 is a wasteful number, since it uses less digits than its factorization.

78938156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794064 (or 1794062 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 78938156 is about 8884.7147393712. The cubic root of 78938156 is about 428.9720460737.

The spelling of 78938156 in words is "seventy-eight million, nine hundred thirty-eight thousand, one hundred fifty-six".