78816244 has 12 divisors (see below), whose sum is σ = 148538404. Its totient is φ = 36376704.

The previous prime is 78816203. The next prime is 78816263. The reversal of 78816244 is 44261887.

It can be written as a sum of positive squares in 2 ways, for example, as 28944400 + 49871844 = 5380^2 + 7062^2 .

It is a hoax number, since the sum of its digits (40) 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 = 78816197 and 78816206.

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, 757797 + ... + 757900.

Almost surely, 2^78816244 is an apocalyptic number.

It is an amenable number.

78816244 is a deficient number, since it is larger than the sum of its proper divisors (69722160).

78816244 is a wasteful number, since it uses less digits than its factorization.

78816244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515714 (or 1515712 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 78816244 is about 8877.8513166194. The cubic root of 78816244 is about 428.7510976407.

The spelling of 78816244 in words is "seventy-eight million, eight hundred sixteen thousand, two hundred forty-four".