12216924 has 72 divisors (see below), whose sum is σ = 33218640. Its totient is φ = 3773952.

The previous prime is 12216907. The next prime is 12216937. The reversal of 12216924 is 42961221.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36084 + ... + 36420.

It is an arithmetic number, because the mean of its divisors is an integer number (461370).

Almost surely, 2^12216924 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 12216924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16609320).

12216924 is an abundant number, since it is smaller than the sum of its proper divisors (21001716).

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

12216924 is a wasteful number, since it uses less digits than its factorization.

12216924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419 (or 414 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 12216924 is about 3495.2716632617. The cubic root of 12216924 is about 230.3141516825.

The spelling of 12216924 in words is "twelve million, two hundred sixteen thousand, nine hundred twenty-four".