78323912 has 16 divisors (see below), whose sum is σ = 148206300. Its totient is φ = 38802240.

The previous prime is 78323897. The next prime is 78323933. The reversal of 78323912 is 21932387.

It can be written as a sum of positive squares in 2 ways, for example, as 75933796 + 2390116 = 8714^2 + 1546^2 .

It is a super-2 number, since 2×78323912² = 12269270381967488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44039 + ... + 45782.

Almost surely, 2^78323912 is an apocalyptic number.

It is an amenable number.

78323912 is a deficient number, since it is larger than the sum of its proper divisors (69882388).

78323912 is a wasteful number, since it uses less digits than its factorization.

78323912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89936 (or 89932 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 78323912 is about 8850.0797736518. The cubic root of 78323912 is about 427.8564895745.

The spelling of 78323912 in words is "seventy-eight million, three hundred twenty-three thousand, nine hundred twelve".