12433440 has 48 divisors (see below), whose sum is σ = 39166848. Its totient is φ = 3315456.

The previous prime is 12433423. The next prime is 12433453. The reversal of 12433440 is 4433421.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12472 + ... + 13431.

It is an arithmetic number, because the mean of its divisors is an integer number (815976).

Almost surely, 2^12433440 is an apocalyptic number.

12433440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12433440 is an abundant number, since it is smaller than the sum of its proper divisors (26733408).

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

12433440 is a wasteful number, since it uses less digits than its factorization.

12433440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25921 (or 25913 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 12433440 is about 3526.1083363958. The cubic root of 12433440 is about 231.6667828327. Note that the first 3 decimals are identical.

Adding to 12433440 its reverse (4433421), we get a palindrome (16866861).

The spelling of 12433440 in words is "twelve million, four hundred thirty-three thousand, four hundred forty".