2004023440 has 20 divisors (see below), whose sum is σ = 4659354684. Its totient is φ = 801609344.

The previous prime is 2004023431. The next prime is 2004023467. The reversal of 2004023440 is 443204002.

It can be written as a sum of positive squares in 2 ways, for example, as 1184461056 + 819562384 = 34416^2 + 28628^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×2004023440² = 8032219896138867200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12525067 + ... + 12525226.

Almost surely, 2^2004023440 is an apocalyptic number.

2004023440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2004023440 is an abundant number, since it is smaller than the sum of its proper divisors (2655331244).

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

2004023440 is a wasteful number, since it uses less digits than its factorization.

2004023440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25050306 (or 25050300 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 2004023440 is about 44766.3203759255. The cubic root of 2004023440 is about 1260.7653534384.

Adding to 2004023440 its reverse (443204002), we get a palindrome (2447227442).

The spelling of 2004023440 in words is "two billion, four million, twenty-three thousand, four hundred forty".