2540220 has 24 divisors (see below), whose sum is σ = 7112784. Its totient is φ = 677376.

The previous prime is 2540203. The next prime is 2540231. The reversal of 2540220 is 220452.

2540220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2540220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21109 + ... + 21228.

It is an arithmetic number, because the mean of its divisors is an integer number (296366).

2^2540220 is an apocalyptic number.

2540220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540220 is an abundant number, since it is smaller than the sum of its proper divisors (4572564).

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

2540220 is a wasteful number, since it uses less digits than its factorization.

2540220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42349 (or 42347 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 2540220 is about 1593.8067636950. The cubic root of 2540220 is about 136.4448381011. Note that the first 3 decimals are identical.

Adding to 2540220 its reverse (220452), we get a palindrome (2760672).

The spelling of 2540220 in words is "two million, five hundred forty thousand, two hundred twenty".