12213936 has 120 divisors (see below), whose sum is σ = 40853040. Its totient is φ = 3483648.

The previous prime is 12213931. The next prime is 12213947. The reversal of 12213936 is 63931221.

It is a super-2 number, since 2×12213936² = 298360465224192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213931) 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 23 ways as a sum of consecutive naturals, for example, 20880 + ... + 21456.

It is an arithmetic number, because the mean of its divisors is an integer number (340442).

Almost surely, 2^12213936 is an apocalyptic number.

12213936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12213936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20426520).

12213936 is an abundant number, since it is smaller than the sum of its proper divisors (28639104).

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

12213936 is a wasteful number, since it uses less digits than its factorization.

12213936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608 (or 589 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 12213936 is about 3494.8442025361. The cubic root of 12213936 is about 230.2953735024.

The spelling of 12213936 in words is "twelve million, two hundred thirteen thousand, nine hundred thirty-six".