78312396 has 12 divisors (see below), whose sum is σ = 182728952. Its totient is φ = 26104128.

The previous prime is 78312389. The next prime is 78312431. The reversal of 78312396 is 69321387.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×78312396² = 12265662734521632, 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, 3263005 + ... + 3263028.

Almost surely, 2^78312396 is an apocalyptic number.

It is an amenable number.

78312396 is an abundant number, since it is smaller than the sum of its proper divisors (104416556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78312396 is a wasteful number, since it uses less digits than its factorization.

78312396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6526040 (or 6526038 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 78312396 is about 8849.4291341306. The cubic root of 78312396 is about 427.8355192361.

The spelling of 78312396 in words is "seventy-eight million, three hundred twelve thousand, three hundred ninety-six".