78783764 has 12 divisors (see below), whose sum is σ = 138317088. Its totient is φ = 39264600.

The previous prime is 78783739. The next prime is 78783769. The reversal of 78783764 is 46738787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78783769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30422 + ... + 32909.

It is an arithmetic number, because the mean of its divisors is an integer number (11526424).

Almost surely, 2^78783764 is an apocalyptic number.

It is an amenable number.

78783764 is a deficient number, since it is larger than the sum of its proper divisors (59533324).

78783764 is a wasteful number, since it uses less digits than its factorization.

78783764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63646 (or 63644 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 50.

The square root of 78783764 is about 8876.0218566653. The cubic root of 78783764 is about 428.6921937553.

The spelling of 78783764 in words is "seventy-eight million, seven hundred eighty-three thousand, seven hundred sixty-four".