78269764 has 12 divisors (see below), whose sum is σ = 139556844. Its totient is φ = 38396384.

The previous prime is 78269743. The next prime is 78269773. The reversal of 78269764 is 46796287.

It can be written as a sum of positive squares in 2 ways, for example, as 49561600 + 28708164 = 7040^2 + 5358^2 .

It is a super-2 number, since 2×78269764² = 12252311913231392, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184387 + ... + 184810.

It is an arithmetic number, because the mean of its divisors is an integer number (11629737).

Almost surely, 2^78269764 is an apocalyptic number.

It is an amenable number.

78269764 is a deficient number, since it is larger than the sum of its proper divisors (61287080).

78269764 is a wasteful number, since it uses less digits than its factorization.

78269764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369254 (or 369252 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 49.

The square root of 78269764 is about 8847.0200632755. The cubic root of 78269764 is about 427.7578695682.

The spelling of 78269764 in words is "seventy-eight million, two hundred sixty-nine thousand, seven hundred sixty-four".