2540940 has 24 divisors (see below), whose sum is σ = 7114800. Its totient is φ = 677568.

The previous prime is 2540933. The next prime is 2540957. The reversal of 2540940 is 490452.

It is a self number, because there is not a number n which added to its sum of digits gives 2540940.

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, 21115 + ... + 21234.

It is an arithmetic number, because the mean of its divisors is an integer number (296450).

2^2540940 is an apocalyptic number.

2540940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540940 is an abundant number, since it is smaller than the sum of its proper divisors (4573860).

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

2540940 is a wasteful number, since it uses less digits than its factorization.

2540940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42361 (or 42359 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2540940 is about 1594.0326219999. The cubic root of 2540940 is about 136.4577281924.

The spelling of 2540940 in words is "two million, five hundred forty thousand, nine hundred forty".