12309976 has 48 divisors (see below), whose sum is σ = 27743040. Its totient is φ = 5100480.

The previous prime is 12309961. The next prime is 12310013. The reversal of 12309976 is 67990321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11646 + ... + 12658.

It is an arithmetic number, because the mean of its divisors is an integer number (577980).

Almost surely, 2^12309976 is an apocalyptic number.

12309976 is the 2026-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12309976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13871520).

12309976 is an abundant number, since it is smaller than the sum of its proper divisors (15433064).

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

12309976 is a wasteful number, since it uses less digits than its factorization.

12309976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1053 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 12309976 is about 3508.5575383625. The cubic root of 12309976 is about 230.8974138916.

The spelling of 12309976 in words is "twelve million, three hundred nine thousand, nine hundred seventy-six".