78916728 has 64 divisors (see below), whose sum is σ = 226569600. Its totient is φ = 22654080.

The previous prime is 78916727. The next prime is 78916741. The reversal of 78916728 is 82761987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78916727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2851 + ... + 12882.

It is an arithmetic number, because the mean of its divisors is an integer number (3540150).

Almost surely, 2^78916728 is an apocalyptic number.

It is an amenable number.

78916728 is an abundant number, since it is smaller than the sum of its proper divisors (147652872).

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

78916728 is a wasteful number, since it uses less digits than its factorization.

78916728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15772 (or 15768 counting only the distinct ones).

The product of its digits is 338688, while the sum is 48.

The square root of 78916728 is about 8883.5087662477. The cubic root of 78916728 is about 428.9332273100.

The spelling of 78916728 in words is "seventy-eight million, nine hundred sixteen thousand, seven hundred twenty-eight".