12443040 has 72 divisors (see below), whose sum is σ = 42466788. Its totient is φ = 3317760.

The previous prime is 12443029. The next prime is 12443047. The reversal of 12443040 is 4034421.

It can be written as a sum of positive squares in 2 ways, for example, as 10732176 + 1710864 = 3276^2 + 1308^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2881 + ... + 5760.

Almost surely, 2^12443040 is an apocalyptic number.

12443040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12443040 is an abundant number, since it is smaller than the sum of its proper divisors (30023748).

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

12443040 is a wasteful number, since it uses less digits than its factorization.

12443040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8662 (or 8651 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 12443040 is about 3527.4693478470. The cubic root of 12443040 is about 231.7263916770.

Adding to 12443040 its reverse (4034421), we get a palindrome (16477461).

The spelling of 12443040 in words is "twelve million, four hundred forty-three thousand, forty".