2006540 has 24 divisors (see below), whose sum is σ = 4318272. Its totient is φ = 782720.

The previous prime is 2006507. The next prime is 2006549. The reversal of 2006540 is 456002.

It is not an unprimeable number, because it can be changed into a prime (2006549) by changing a digit.

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, 404 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (179928).

2^2006540 is an apocalyptic number.

2006540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2006540 is an abundant number, since it is smaller than the sum of its proper divisors (2311732).

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

2006540 is a wasteful number, since it uses less digits than its factorization.

2006540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2006540 is about 1416.5239143763. The cubic root of 2006540 is about 126.1292869641.

The spelling of 2006540 in words is "two million, six thousand, five hundred forty".