Search a number
83520 = 2632529
BaseRepresentation
bin10100011001000000
311020120100
4110121000
510133040
61442400
7465333
oct243100
9136510
1083520
1157828
1240400
132c028
142261a
1519b30
hex14640

83520 has 84 divisors (see below), whose sum is σ = 297180. Its totient is φ = 21504.

The previous prime is 83497. The next prime is 83537. The reversal of 83520 is 2538.

Adding to 83520 its sum of digits (18), we get a palindrome (83538).

It is a Cunningham number, because it is equal to 174-1.

It can be written as a sum of positive squares in 2 ways, for example, as 36864 + 46656 = 192^2 + 216^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 83493 and 83502.

It is a congruent number.

It is an unprimeable number.

83520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2866 + ... + 2894.

283520 is an apocalyptic number.

83520 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 83520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148590).

83520 is an abundant number, since it is smaller than the sum of its proper divisors (213660).

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

83520 is a wasteful number, since it uses less digits than its factorization.

83520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 83520 is about 288.9982698910. The cubic root of 83520 is about 43.7116125862.

The spelling of 83520 in words is "eighty-three thousand, five hundred twenty".