12333440 has 64 divisors (see below), whose sum is σ = 33708960. Its totient is φ = 4227072.

The previous prime is 12333437. The next prime is 12333473. The reversal of 12333440 is 4433321.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×12333440² = 304227484467200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3104 + ... + 5856.

Almost surely, 2^12333440 is an apocalyptic number.

12333440 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 12333440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16854480).

12333440 is an abundant number, since it is smaller than the sum of its proper divisors (21375520).

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

12333440 is an equidigital number, since it uses as much as digits as its factorization.

12333440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2779 (or 2767 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 12333440 is about 3511.8997707793. The cubic root of 12333440 is about 231.0440250167.

Adding to 12333440 its reverse (4433321), we get a palindrome (16766761).

The spelling of 12333440 in words is "twelve million, three hundred thirty-three thousand, four hundred forty".