12214240 has 48 divisors (see below), whose sum is σ = 29190672. Its totient is φ = 4829184.

The previous prime is 12214183. The next prime is 12214243. The reversal of 12214240 is 4241221.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12214243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15127 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (608139).

Almost surely, 2^12214240 is an apocalyptic number.

12214240 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 12214240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14595336).

12214240 is an abundant number, since it is smaller than the sum of its proper divisors (16976432).

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

12214240 is an equidigital number, since it uses as much as digits as its factorization.

12214240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12214240 is about 3494.8876949052. The cubic root of 12214240 is about 230.2972841399.

Adding to 12214240 its reverse (4241221), we get a palindrome (16455461).

The spelling of 12214240 in words is "twelve million, two hundred fourteen thousand, two hundred forty".