8529840 has 160 divisors (see below), whose sum is σ = 32140800. Its totient is φ = 2062080.

The previous prime is 8529823. The next prime is 8529847. The reversal of 8529840 is 489258.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8529795 and 8529804.

It is not an unprimeable number, because it can be changed into a prime (8529847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23581 + ... + 23939.

It is an arithmetic number, because the mean of its divisors is an integer number (200880).

Almost surely, 2^8529840 is an apocalyptic number.

8529840 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 8529840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16070400).

8529840 is an abundant number, since it is smaller than the sum of its proper divisors (23610960).

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

8529840 is a wasteful number, since it uses less digits than its factorization.

8529840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 8529840 is about 2920.5889816953. The cubic root of 8529840 is about 204.3212930168.

The spelling of 8529840 in words is "eight million, five hundred twenty-nine thousand, eight hundred forty".