12214440 has 192 divisors, whose sum is σ = 46949760. Its totient is φ = 2695680.

The previous prime is 12214417. The next prime is 12214441. The reversal of 12214440 is 4441221.

12214440 is a `hidden beast` number, since 1 + 221 + 4 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12214441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93175 + ... + 93305.

It is an arithmetic number, because the mean of its divisors is an integer number (244530).

Almost surely, 2^12214440 is an apocalyptic number.

12214440 is a gapful number since it is divisible by the number (10) 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 12214440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23474880).

12214440 is an abundant number, since it is smaller than the sum of its proper divisors (34735320).

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

12214440 is a wasteful number, since it uses less digits than its factorization.

12214440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 12214440 is about 3494.9163080108. The cubic root of 12214440 is about 230.2985411210.

Adding to 12214440 its reverse (4441221), we get a palindrome (16655661).

The spelling of 12214440 in words is "twelve million, two hundred fourteen thousand, four hundred forty".