2540784 has 40 divisors (see below), whose sum is σ = 6721792. Its totient is φ = 826560.

The previous prime is 2540771. The next prime is 2540789. The reversal of 2540784 is 4870452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540789) 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, 1449 + ... + 2679.

2^2540784 is an apocalyptic number.

2540784 is a gapful number since it is divisible by the number (24) 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 2540784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3360896).

2540784 is an abundant number, since it is smaller than the sum of its proper divisors (4181008).

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

2540784 is a wasteful number, since it uses less digits than its factorization.

2540784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 2540784 is about 1593.9836887497. The cubic root of 2540784 is about 136.4549355459.

The spelling of 2540784 in words is "two million, five hundred forty thousand, seven hundred eighty-four".