12283440 has 160 divisors (see below), whose sum is σ = 42663936. Its totient is φ = 2903040.

The previous prime is 12283429. The next prime is 12283441. The reversal of 12283440 is 4438221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12283440.

It is not an unprimeable number, because it can be changed into a prime (12283441) 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 31 ways as a sum of consecutive naturals, for example, 96657 + ... + 96783.

Almost surely, 2^12283440 is an apocalyptic number.

12283440 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 12283440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21331968).

12283440 is an abundant number, since it is smaller than the sum of its proper divisors (30380496).

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

12283440 is a wasteful number, since it uses less digits than its factorization.

12283440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 12283440 is about 3504.7738871431. The cubic root of 12283440 is about 230.7313831948.

The spelling of 12283440 in words is "twelve million, two hundred eighty-three thousand, four hundred forty".