78712680 has 64 divisors (see below), whose sum is σ = 236779200. Its totient is φ = 20933120.

The previous prime is 78712679. The next prime is 78712681. The reversal of 78712680 is 8621787.

It is an interprime number because it is at equal distance from previous prime (78712679) and next prime (78712681).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (78712681) 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, 61891 + ... + 63149.

It is an arithmetic number, because the mean of its divisors is an integer number (3699675).

Almost surely, 2^78712680 is an apocalyptic number.

It is an amenable number.

78712680 is an abundant number, since it is smaller than the sum of its proper divisors (158066520).

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

78712680 is a wasteful number, since it uses less digits than its factorization.

78712680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794 (or 1790 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 78712680 is about 8872.0166816795. The cubic root of 78712680 is about 428.5632233350.

The spelling of 78712680 in words is "seventy-eight million, seven hundred twelve thousand, six hundred eighty".