12649984 has 40 divisors (see below), whose sum is σ = 26123328. Its totient is φ = 6113280.

The previous prime is 12649979. The next prime is 12649993. The reversal of 12649984 is 48994621.

It is a self number, because there is not a number n which added to its sum of digits gives 12649984.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15474 + ... + 16270.

Almost surely, 2^12649984 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 12649984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13061664).

12649984 is an abundant number, since it is smaller than the sum of its proper divisors (13473344).

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

12649984 is an frugal number, since it uses more digits than its factorization.

12649984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 830 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 12649984 is about 3556.6815994688. The cubic root of 12649984 is about 233.0039724988.

The spelling of 12649984 in words is "twelve million, six hundred forty-nine thousand, nine hundred eighty-four".