78944224 has 24 divisors (see below), whose sum is σ = 157745448. Its totient is φ = 38881920.

The previous prime is 78944219. The next prime is 78944227. The reversal of 78944224 is 42244987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78944227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16267 + ... + 20554.

It is an arithmetic number, because the mean of its divisors is an integer number (6572727).

Almost surely, 2^78944224 is an apocalyptic number.

It is an amenable number.

78944224 is a deficient number, since it is larger than the sum of its proper divisors (78801224).

78944224 is a wasteful number, since it uses less digits than its factorization.

78944224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36898 (or 36890 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 78944224 is about 8885.0562181677. The cubic root of 78944224 is about 428.9830375291.

The spelling of 78944224 in words is "seventy-eight million, nine hundred forty-four thousand, two hundred twenty-four".