78321368 has 16 divisors (see below), whose sum is σ = 146959080. Its totient is φ = 39132288.

The previous prime is 78321349. The next prime is 78321413. The reversal of 78321368 is 86312387.

It is a happy number.

It is a super-2 number, since 2×78321368² = 12268473370782848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 12371 + ... + 17597.

Almost surely, 2^78321368 is an apocalyptic number.

It is an amenable number.

78321368 is a deficient number, since it is larger than the sum of its proper divisors (68637712).

78321368 is a wasteful number, since it uses less digits than its factorization.

78321368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7106 (or 7102 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 78321368 is about 8849.9360449667. The cubic root of 78321368 is about 427.8518571932.

The spelling of 78321368 in words is "seventy-eight million, three hundred twenty-one thousand, three hundred sixty-eight".