78844916 has 12 divisors (see below), whose sum is σ = 138680388. Its totient is φ = 39221952.

The previous prime is 78844901. The next prime is 78844921. The reversal of 78844916 is 61944887.

It can be written as a sum of positive squares in 2 ways, for example, as 62410000 + 16434916 = 7900^2 + 4054^2 .

It is a congruent number.

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, 49241 + ... + 50816.

It is an arithmetic number, because the mean of its divisors is an integer number (11556699).

Almost surely, 2^78844916 is an apocalyptic number.

It is an amenable number.

78844916 is a deficient number, since it is larger than the sum of its proper divisors (59835472).

78844916 is a wasteful number, since it uses less digits than its factorization.

78844916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100258 (or 100256 counting only the distinct ones).

The product of its digits is 387072, while the sum is 47.

The square root of 78844916 is about 8879.4659749334. The cubic root of 78844916 is about 428.8030821068.

The spelling of 78844916 in words is "seventy-eight million, eight hundred forty-four thousand, nine hundred sixteen".