2003720 has 16 divisors (see below), whose sum is σ = 4508460. Its totient is φ = 801472.

The previous prime is 2003681. The next prime is 2003723. The reversal of 2003720 is 273002.

It can be written as a sum of positive squares in 2 ways, for example, as 1747684 + 256036 = 1322^2 + 506^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2003695 and 2003704.

It is not an unprimeable number, because it can be changed into a prime (2003723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25007 + ... + 25086.

2^2003720 is an apocalyptic number.

2003720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2003720 is an abundant number, since it is smaller than the sum of its proper divisors (2504740).

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

2003720 is a wasteful number, since it uses less digits than its factorization.

2003720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50104 (or 50100 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 2003720 is about 1415.5281699776. The cubic root of 2003720 is about 126.0701717132.

Adding to 2003720 its reverse (273002), we get a palindrome (2276722).

The spelling of 2003720 in words is "two million, three thousand, seven hundred twenty".