78886764 has 48 divisors (see below), whose sum is σ = 223117440. Its totient is φ = 23904720.

The previous prime is 78886763. The next prime is 78886799. The reversal of 78886764 is 46768887.

78886764 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

78886764 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 78886764.

It is not an unprimeable number, because it can be changed into a prime (78886763) 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, 32014 + ... + 34389.

It is an arithmetic number, because the mean of its divisors is an integer number (4648280).

Almost surely, 2^78886764 is an apocalyptic number.

It is an amenable number.

78886764 is an abundant number, since it is smaller than the sum of its proper divisors (144230676).

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

78886764 is a wasteful number, since it uses less digits than its factorization.

78886764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66427 (or 66419 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The square root of 78886764 is about 8881.8221103555. The cubic root of 78886764 is about 428.8789330239.

The spelling of 78886764 in words is "seventy-eight million, eight hundred eighty-six thousand, seven hundred sixty-four".