78693764 has 24 divisors (see below), whose sum is σ = 146422080. Its totient is φ = 36923744.

The previous prime is 78693743. The next prime is 78693821. The reversal of 78693764 is 46739687.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3194 + ... + 12945.

It is an arithmetic number, because the mean of its divisors is an integer number (6100920).

Almost surely, 2^78693764 is an apocalyptic number.

It is an amenable number.

78693764 is a deficient number, since it is larger than the sum of its proper divisors (67728316).

78693764 is a wasteful number, since it uses less digits than its factorization.

78693764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16219 (or 16217 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 50.

The square root of 78693764 is about 8870.9505691329. The cubic root of 78693764 is about 428.5288902330.

The spelling of 78693764 in words is "seventy-eight million, six hundred ninety-three thousand, seven hundred sixty-four".