12209976 has 24 divisors (see below), whose sum is σ = 33068880. Its totient is φ = 4069968.

The previous prime is 12209971. The next prime is 12209993. The reversal of 12209976 is 67990221.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 12209976.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12209971) 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, 84720 + ... + 84863.

It is an arithmetic number, because the mean of its divisors is an integer number (1377870).

Almost surely, 2^12209976 is an apocalyptic number.

It is an amenable number.

12209976 is an abundant number, since it is smaller than the sum of its proper divisors (20858904).

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

12209976 is a wasteful number, since it uses less digits than its factorization.

12209976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169595 (or 169588 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 12209976 is about 3494.2776077467. The cubic root of 12209976 is about 230.2704820381.

The spelling of 12209976 in words is "twelve million, two hundred nine thousand, nine hundred seventy-six".