78864044 has 12 divisors (see below), whose sum is σ = 157728144. Its totient is φ = 33798864.

The previous prime is 78864011. The next prime is 78864059. The reversal of 78864044 is 44046887.

78864044 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78863992 and 78864010.

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, 1408259 + ... + 1408314.

It is an arithmetic number, because the mean of its divisors is an integer number (13144012).

Almost surely, 2^78864044 is an apocalyptic number.

It is an amenable number.

78864044 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.

78864044 is a wasteful number, since it uses less digits than its factorization.

78864044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816584 (or 2816582 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 78864044 is about 8880.5430014161. The cubic root of 78864044 is about 428.8377555839.

The spelling of 78864044 in words is "seventy-eight million, eight hundred sixty-four thousand, forty-four".