78916628 has 12 divisors (see below), whose sum is σ = 157833312. Its totient is φ = 33821400.

The previous prime is 78916609. The next prime is 78916631. The reversal of 78916628 is 82661987.

78916628 is an admirable number.

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, 1409198 + ... + 1409253.

It is an arithmetic number, because the mean of its divisors is an integer number (13152776).

Almost surely, 2^78916628 is an apocalyptic number.

It is an amenable number.

78916628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78916628 is a wasteful number, since it uses less digits than its factorization.

78916628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2818462 (or 2818460 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 78916628 is about 8883.5031378393. The cubic root of 78916628 is about 428.9330461345.

The spelling of 78916628 in words is "seventy-eight million, nine hundred sixteen thousand, six hundred twenty-eight".