12440920 has 64 divisors (see below), whose sum is σ = 29491200. Its totient is φ = 4717440.

The previous prime is 12440899. The next prime is 12440921. The reversal of 12440920 is 2904421.

It is a junction number, because it is equal to n+sod(n) for n = 12440891 and 12440900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97897 + ... + 98023.

It is an arithmetic number, because the mean of its divisors is an integer number (460800).

Almost surely, 2^12440920 is an apocalyptic number.

12440920 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 12440920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14745600).

12440920 is an abundant number, since it is smaller than the sum of its proper divisors (17050280).

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

12440920 is a wasteful number, since it uses less digits than its factorization.

12440920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12440920 is about 3527.1688363332. The cubic root of 12440920 is about 231.7132306956.

The spelling of 12440920 in words is "twelve million, four hundred forty thousand, nine hundred twenty".