78646444 has 12 divisors (see below), whose sum is σ = 137737600. Its totient is φ = 39292848.

The previous prime is 78646439. The next prime is 78646457. The reversal of 78646444 is 44464687.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78646444.

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, 1164 + ... + 12595.

Almost surely, 2^78646444 is an apocalyptic number.

It is an amenable number.

78646444 is a deficient number, since it is larger than the sum of its proper divisors (59091156).

78646444 is a wasteful number, since it uses less digits than its factorization.

78646444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15192 (or 15190 counting only the distinct ones).

The product of its digits is 516096, while the sum is 43.

The square root of 78646444 is about 8868.2830356276. The cubic root of 78646444 is about 428.4429789234.

The spelling of 78646444 in words is "seventy-eight million, six hundred forty-six thousand, four hundred forty-four".