8730520 has 64 divisors (see below), whose sum is σ = 21422880. Its totient is φ = 3188736.

The previous prime is 8730517. The next prime is 8730529. The reversal of 8730520 is 250378.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8730529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24987 + ... + 25333.

Almost surely, 2^8730520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8730520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10711440).

8730520 is an abundant number, since it is smaller than the sum of its proper divisors (12692360).

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

8730520 is a wasteful number, since it uses less digits than its factorization.

8730520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 8730520 is about 2954.7453358961. The cubic root of 8730520 is about 205.9112320594.

Adding to 8730520 its reverse (250378), we get a palindrome (8980898).

The spelling of 8730520 in words is "eight million, seven hundred thirty thousand, five hundred twenty".