12022440 has 64 divisors (see below), whose sum is σ = 37972800. Its totient is φ = 3036672.

The previous prime is 12022433. The next prime is 12022441. The reversal of 12022440 is 4422021.

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

It is not an unprimeable number, because it can be changed into a prime (12022441) 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 15 ways as a sum of consecutive naturals, for example, 357 + ... + 4916.

It is an arithmetic number, because the mean of its divisors is an integer number (593325).

Almost surely, 2^12022440 is an apocalyptic number.

12022440 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 12022440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18986400).

12022440 is an abundant number, since it is smaller than the sum of its proper divisors (25950360).

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

12022440 is a wasteful number, since it uses less digits than its factorization.

12022440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306 (or 5302 counting only the distinct ones).

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

The square root of 12022440 is about 3467.3390373599. The cubic root of 12022440 is about 229.0854673574.

Adding to 12022440 its reverse (4422021), we get a palindrome (16444461).

The spelling of 12022440 in words is "twelve million, twenty-two thousand, four hundred forty".