12224040 has 128 divisors (see below), whose sum is σ = 39536640. Its totient is φ = 3015936.

The previous prime is 12224029. The next prime is 12224053. The reversal of 12224040 is 4042221.

12224040 is a nontrivial binomial coefficient, being equal to C(4945, 2).

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118629 + ... + 118731.

It is an arithmetic number, because the mean of its divisors is an integer number (308880).

Almost surely, 2^12224040 is an apocalyptic number.

12224040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12224040 is the 4944-th triangular number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12224040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19768320).

12224040 is an abundant number, since it is smaller than the sum of its proper divisors (27312600).

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

12224040 is a wasteful number, since it uses less digits than its factorization.

12224040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 12224040 is about 3496.2894617008. The cubic root of 12224040 is about 230.3588600832.

Adding to 12224040 its reverse (4042221), we get a palindrome (16266261).

The spelling of 12224040 in words is "twelve million, two hundred twenty-four thousand, forty".