12489984 has 144 divisors (see below), whose sum is σ = 40062400. Its totient is φ = 3815424.

The previous prime is 12489959. The next prime is 12489991. The reversal of 12489984 is 48998421.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89787 + ... + 89925.

Almost surely, 2^12489984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12489984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20031200).

12489984 is an abundant number, since it is smaller than the sum of its proper divisors (27572416).

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

12489984 is a wasteful number, since it uses less digits than its factorization.

12489984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 157 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 12489984 is about 3534.1171457664. The cubic root of 12489984 is about 232.0174382453.

The spelling of 12489984 in words is "twelve million, four hundred eighty-nine thousand, nine hundred eighty-four".