12394390856 has 16 divisors (see below), whose sum is σ = 23806300140. Its totient is φ = 6046044160.

The previous prime is 12394390847. The next prime is 12394390873. The reversal of 12394390856 is 65809349321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12256704100 + 137686756 = 110710^2 + 11734^2 .

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, 18893561 + ... + 18894216.

Almost surely, 2^12394390856 is an apocalyptic number.

It is an amenable number.

12394390856 is a deficient number, since it is larger than the sum of its proper divisors (11411909284).

12394390856 is a wasteful number, since it uses less digits than its factorization.

12394390856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37787824 (or 37787820 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 12394390856 in words is "twelve billion, three hundred ninety-four million, three hundred ninety thousand, eight hundred fifty-six".