78394324 has 12 divisors (see below), whose sum is σ = 137687284. Its totient is φ = 39055104.

The previous prime is 78394321. The next prime is 78394331. The reversal of 78394324 is 42349387.

It can be written as a sum of positive squares in 2 ways, for example, as 15350724 + 63043600 = 3918^2 + 7940^2 .

It is a super-2 number, since 2×78394324² = 12291340070833952, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78394321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34269 + ... + 36484.

Almost surely, 2^78394324 is an apocalyptic number.

It is an amenable number.

78394324 is a deficient number, since it is larger than the sum of its proper divisors (59292960).

78394324 is a wasteful number, since it uses less digits than its factorization.

78394324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71034 (or 71032 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 78394324 is about 8854.0569232415. The cubic root of 78394324 is about 427.9846633221.

The spelling of 78394324 in words is "seventy-eight million, three hundred ninety-four thousand, three hundred twenty-four".