82859520 has 80 divisors (see below), whose sum is σ = 264916080. Its totient is φ = 22093824.

The previous prime is 82859519. The next prime is 82859527. The reversal of 82859520 is 2595828.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82859527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2286 + ... + 13074.

It is an arithmetic number, because the mean of its divisors is an integer number (3311451).

Almost surely, 2^82859520 is an apocalyptic number.

82859520 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 82859520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132458040).

82859520 is an abundant number, since it is smaller than the sum of its proper divisors (182056560).

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

82859520 is a wasteful number, since it uses less digits than its factorization.

82859520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10815 (or 10799 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 82859520 is about 9102.7204724741. The cubic root of 82859520 is about 435.9608303055.

The spelling of 82859520 in words is "eighty-two million, eight hundred fifty-nine thousand, five hundred twenty".