12399436 has 12 divisors (see below), whose sum is σ = 24798928. Its totient is φ = 5314032.

The previous prime is 12399427. The next prime is 12399451. The reversal of 12399436 is 63499321.

12399436 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12399395 and 12399404.

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, 221391 + ... + 221446.

Almost surely, 2^12399436 is an apocalyptic number.

It is an amenable number.

12399436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12399436 is a wasteful number, since it uses less digits than its factorization.

12399436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442848 (or 442846 counting only the distinct ones).

The product of its digits is 34992, while the sum is 37.

The square root of 12399436 is about 3521.2832888025. The cubic root of 12399436 is about 231.4553961837.

The spelling of 12399436 in words is "twelve million, three hundred ninety-nine thousand, four hundred thirty-six".