78324388 has 12 divisors (see below), whose sum is σ = 139391280. Its totient is φ = 38498312.

The previous prime is 78324377. The next prime is 78324397. The reversal of 78324388 is 88342387.

It is a super-2 number, since 2×78324388² = 12269419511149088, 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, 165706 + ... + 166177.

It is an arithmetic number, because the mean of its divisors is an integer number (11615940).

Almost surely, 2^78324388 is an apocalyptic number.

It is an amenable number.

78324388 is a deficient number, since it is larger than the sum of its proper divisors (61066892).

78324388 is a wasteful number, since it uses less digits than its factorization.

78324388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331946 (or 331944 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 78324388 is about 8850.1066660239. The cubic root of 78324388 is about 427.8573563140.

The spelling of 78324388 in words is "seventy-eight million, three hundred twenty-four thousand, three hundred eighty-eight".