8573520 has 80 divisors (see below), whose sum is σ = 26873280. Its totient is φ = 2260992.

The previous prime is 8573519. The next prime is 8573533. The reversal of 8573520 is 253758.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33232 + ... + 33488.

It is an arithmetic number, because the mean of its divisors is an integer number (335916).

Almost surely, 2^8573520 is an apocalyptic number.

8573520 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 8573520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13436640).

8573520 is an abundant number, since it is smaller than the sum of its proper divisors (18299760).

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

8573520 is a wasteful number, since it uses less digits than its factorization.

8573520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 8573520 is about 2928.0573764870. The cubic root of 8573520 is about 204.6694653613.

The spelling of 8573520 in words is "eight million, five hundred seventy-three thousand, five hundred twenty".