78849028 has 12 divisors (see below), whose sum is σ = 142744140. Its totient is φ = 38064992.

The previous prime is 78849019. The next prime is 78849041. The reversal of 78849028 is 82094887.

It can be written as a sum of positive squares in 2 ways, for example, as 60341824 + 18507204 = 7768^2 + 4302^2 .

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, 339751 + ... + 339982.

It is an arithmetic number, because the mean of its divisors is an integer number (11895345).

Almost surely, 2^78849028 is an apocalyptic number.

It is an amenable number.

78849028 is a deficient number, since it is larger than the sum of its proper divisors (63895112).

78849028 is a wasteful number, since it uses less digits than its factorization.

78849028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679766 (or 679764 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 78849028 is about 8879.6975173707. The cubic root of 78849028 is about 428.8105364350.

The spelling of 78849028 in words is "seventy-eight million, eight hundred forty-nine thousand, twenty-eight".