2443940 has 24 divisors (see below), whose sum is σ = 5193720. Its totient is φ = 965888.

The previous prime is 2443939. The next prime is 2443949. The reversal of 2443940 is 493442.

It can be written as a sum of positive squares in 4 ways, for example, as 550564 + 1893376 = 742^2 + 1376^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2443949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1094 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (216405).

2^2443940 is an apocalyptic number.

2443940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2443940 is an abundant number, since it is smaller than the sum of its proper divisors (2749780).

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

2443940 is a wasteful number, since it uses less digits than its factorization.

2443940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 2443940 is about 1563.3105897422. The cubic root of 2443940 is about 134.6987337723.

The spelling of 2443940 in words is "two million, four hundred forty-three thousand, nine hundred forty".