2004840 has 48 divisors (see below), whose sum is σ = 6516900. Its totient is φ = 534528.

The previous prime is 2004839. The next prime is 2004851. The reversal of 2004840 is 484002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1887876 + 116964 = 1374^2 + 342^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2425 + ... + 3144.

2^2004840 is an apocalyptic number.

2004840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2004840 is an abundant number, since it is smaller than the sum of its proper divisors (4512060).

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

2004840 is a wasteful number, since it uses less digits than its factorization.

2004840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5586 (or 5579 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2004840 is about 1415.9237267593. The cubic root of 2004840 is about 126.0936567464.

Adding to 2004840 its reverse (484002), we get a palindrome (2488842).

The spelling of 2004840 in words is "two million, four thousand, eight hundred forty".