78844516 has 12 divisors (see below), whose sum is σ = 138516588. Its totient is φ = 39268352.

The previous prime is 78844511. The next prime is 78844523. The reversal of 78844516 is 61544887.

It can be written as a sum of positive squares in 2 ways, for example, as 56942116 + 21902400 = 7546^2 + 4680^2 .

It is not an unprimeable number, because it can be changed into a prime (78844511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37321 + ... + 39376.

It is an arithmetic number, because the mean of its divisors is an integer number (11543049).

Almost surely, 2^78844516 is an apocalyptic number.

It is an amenable number.

78844516 is a deficient number, since it is larger than the sum of its proper divisors (59672072).

78844516 is a wasteful number, since it uses less digits than its factorization.

78844516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76958 (or 76956 counting only the distinct ones).

The product of its digits is 215040, while the sum is 43.

The square root of 78844516 is about 8879.4434510278. The cubic root of 78844516 is about 428.8023569638.

The spelling of 78844516 in words is "seventy-eight million, eight hundred forty-four thousand, five hundred sixteen".