2543040 has 84 divisors (see below), whose sum is σ = 8756904. Its totient is φ = 677376.

The previous prime is 2543033. The next prime is 2543059. The reversal of 2543040 is 403452.

It is a happy number.

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

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁹ + 4³ + 3³ + 0 + 4⁸ + 0 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2439 + ... + 3321.

2^2543040 is an apocalyptic number.

2543040 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 2543040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4378452).

2543040 is an abundant number, since it is smaller than the sum of its proper divisors (6213864).

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

2543040 is a wasteful number, since it uses less digits than its factorization.

2543040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 2543040 is about 1594.6911926765. The cubic root of 2543040 is about 136.4953103891.

Adding to 2543040 its reverse (403452), we get a palindrome (2946492).

The spelling of 2543040 in words is "two million, five hundred forty-three thousand, forty".