78886680 has 128 divisors (see below), whose sum is σ = 246343680. Its totient is φ = 20195840.

The previous prime is 78886673. The next prime is 78886697. The reversal of 78886680 is 8668887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400342 + ... + 400538.

It is an arithmetic number, because the mean of its divisors is an integer number (1924560).

Almost surely, 2^78886680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78886680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123171840).

78886680 is an abundant number, since it is smaller than the sum of its proper divisors (167457000).

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

78886680 is a wasteful number, since it uses less digits than its factorization.

78886680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The square root of 78886680 is about 8881.8173815948. The cubic root of 78886680 is about 428.8787807979.

The spelling of 78886680 in words is "seventy-eight million, eight hundred eighty-six thousand, six hundred eighty".