2004540 has 24 divisors (see below), whose sum is σ = 5612880. Its totient is φ = 534528.

The previous prime is 2004539. The next prime is 2004559. The reversal of 2004540 is 454002.

It is a super-2 number, since 2×2004540² = 8036361223200, which contains 22 as substring.

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

It is a congruent number.

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, 16645 + ... + 16764.

It is an arithmetic number, because the mean of its divisors is an integer number (233870).

2^2004540 is an apocalyptic number.

2004540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2004540 is an abundant number, since it is smaller than the sum of its proper divisors (3608340).

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

2004540 is a wasteful number, since it uses less digits than its factorization.

2004540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33421 (or 33419 counting only the distinct ones).

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

The square root of 2004540 is about 1415.8177848862. The cubic root of 2004540 is about 126.0873669704.

Adding to 2004540 its reverse (454002), we get a palindrome (2458542).

The spelling of 2004540 in words is "two million, four thousand, five hundred forty".