12223140 has 48 divisors (see below), whose sum is σ = 34497792. Its totient is φ = 3233536.

The previous prime is 12223139. The next prime is 12223199. The reversal of 12223140 is 4132221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7477 + ... + 8963.

It is an arithmetic number, because the mean of its divisors is an integer number (718704).

Almost surely, 2^12223140 is an apocalyptic number.

12223140 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 12223140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17248896).

12223140 is an abundant number, since it is smaller than the sum of its proper divisors (22274652).

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

12223140 is a wasteful number, since it uses less digits than its factorization.

12223140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1634 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12223140 is about 3496.1607514529. The cubic root of 12223140 is about 230.3532065223.

Adding to 12223140 its reverse (4132221), we get a palindrome (16355361).

The spelling of 12223140 in words is "twelve million, two hundred twenty-three thousand, one hundred forty".