2443540 has 48 divisors (see below), whose sum is σ = 5806080. Its totient is φ = 855680.

The previous prime is 2443537. The next prime is 2443541. The reversal of 2443540 is 453442.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2443541) 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, 6189 + ... + 6571.

It is an arithmetic number, because the mean of its divisors is an integer number (120960).

2^2443540 is an apocalyptic number.

2443540 is a gapful number since it is divisible by the number (20) 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 2443540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2903040).

2443540 is an abundant number, since it is smaller than the sum of its proper divisors (3362540).

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

2443540 is a wasteful number, since it uses less digits than its factorization.

2443540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 2443540 is about 1563.1826508761. The cubic root of 2443540 is about 134.6913846512.

Adding to 2443540 its reverse (453442), we get a palindrome (2896982).

The spelling of 2443540 in words is "two million, four hundred forty-three thousand, five hundred forty".