2040540 has 48 divisors (see below), whose sum is σ = 5806080. Its totient is φ = 535360.

The previous prime is 2040539. The next prime is 2040541. The reversal of 2040540 is 450402.

It is an interprime number because it is at equal distance from previous prime (2040539) and next prime (2040541).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4021 + ... + 4499.

It is an arithmetic number, because the mean of its divisors is an integer number (120960).

2^2040540 is an apocalyptic number.

2040540 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 2040540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2903040).

2040540 is an abundant number, since it is smaller than the sum of its proper divisors (3765540).

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

2040540 is a wasteful number, since it uses less digits than its factorization.

2040540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 560 counting only the distinct ones).

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

The square root of 2040540 is about 1428.4747110117. The cubic root of 2040540 is about 126.8377036952.

Adding to 2040540 its reverse (450402), we get a palindrome (2490942).

The spelling of 2040540 in words is "two million, forty thousand, five hundred forty".