12399984 has 30 divisors (see below), whose sum is σ = 34703136. Its totient is φ = 4133280.

The previous prime is 12399983. The next prime is 12399991. The reversal of 12399984 is 48999321.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12399983) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 42912 + ... + 43199.

Almost surely, 2^12399984 is an apocalyptic number.

It is an amenable number.

12399984 is an abundant number, since it is smaller than the sum of its proper divisors (22303152).

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

12399984 is a wasteful number, since it uses less digits than its factorization.

12399984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86125 (or 86116 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 12399984 is about 3521.3611004837. The cubic root of 12399984 is about 231.4588059003.

The spelling of 12399984 in words is "twelve million, three hundred ninety-nine thousand, nine hundred eighty-four".