8003520 has 168 divisors, whose sum is σ = 31540704. Its totient is φ = 1824768.

The previous prime is 8003509. The next prime is 8003521. The reversal of 8003520 is 253008.

It is a tau number, because it is divible by the number of its divisors (168).

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

It is a junction number, because it is equal to n+sod(n) for n = 8003493 and 8003502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8003521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19962 + ... + 20358.

Almost surely, 2^8003520 is an apocalyptic number.

8003520 is a gapful number since it is divisible by the number (80) 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 8003520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15770352).

8003520 is an abundant number, since it is smaller than the sum of its proper divisors (23537184).

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

8003520 is a wasteful number, since it uses less digits than its factorization.

8003520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 8003520 is about 2829.0493102808. The cubic root of 8003520 is about 200.0293290322.

Adding to 8003520 its reverse (253008), we get a palindrome (8256528).

The spelling of 8003520 in words is "eight million, three thousand, five hundred twenty".