2003520 has 56 divisors (see below), whose sum is σ = 6364224. Its totient is φ = 534016.

The previous prime is 2003509. The next prime is 2003557. The reversal of 2003520 is 253002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 2003496 and 2003505.

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, 84 + ... + 2003.

2^2003520 is an apocalyptic number.

2003520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2003520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3182112).

2003520 is an abundant number, since it is smaller than the sum of its proper divisors (4360704).

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

2003520 is a wasteful number, since it uses less digits than its factorization.

2003520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107 (or 2097 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 2003520 is about 1415.4575232058. The cubic root of 2003520 is about 126.0659770364.

Adding to 2003520 its reverse (253002), we get a palindrome (2256522).

The spelling of 2003520 in words is "two million, three thousand, five hundred twenty".