8533520 has 20 divisors (see below), whose sum is σ = 19840620. Its totient is φ = 3413376.

The previous prime is 8533517. The next prime is 8533531. The reversal of 8533520 is 253358.

It can be written as a sum of positive squares in 2 ways, for example, as 1731856 + 6801664 = 1316^2 + 2608^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 8533520.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53255 + ... + 53414.

It is an arithmetic number, because the mean of its divisors is an integer number (992031).

Almost surely, 2^8533520 is an apocalyptic number.

8533520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8533520 is an abundant number, since it is smaller than the sum of its proper divisors (11307100).

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

8533520 is a wasteful number, since it uses less digits than its factorization.

8533520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106682 (or 106676 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 8533520 is about 2921.2189236687. The cubic root of 8533520 is about 204.3506720069.

Adding to 8533520 its reverse (253358), we get a palindrome (8786878).

The spelling of 8533520 in words is "eight million, five hundred thirty-three thousand, five hundred twenty".