2540290 has 16 divisors (see below), whose sum is σ = 4659768. Its totient is φ = 996736.

The previous prime is 2540269. The next prime is 2540323. The reversal of 2540290 is 920452.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2486929 + 53361 = 1577^2 + 231^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1867 + ... + 2926.

2^2540290 is an apocalyptic number.

2540290 is a deficient number, since it is larger than the sum of its proper divisors (2119478).

2540290 is a wasteful number, since it uses less digits than its factorization.

2540290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4853.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 2540290 is about 1593.8287235459. The cubic root of 2540290 is about 136.4460914113.

The spelling of 2540290 in words is "two million, five hundred forty thousand, two hundred ninety".