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813320 = 23520333
BaseRepresentation
bin11000110100100001000
31112022122222
43012210020
5202011240
625233212
76625124
oct3064410
91468588
10813320
11506072
12332808
13226271
14172584
15110eb5
hexc6908

813320 has 16 divisors (see below), whose sum is σ = 1830060. Its totient is φ = 325312.

The previous prime is 813311. The next prime is 813343. The reversal of 813320 is 23318.

It can be written as a sum of positive squares in 2 ways, for example, as 770884 + 42436 = 878^2 + 206^2 .

It is a super-2 number, since 2×8133202 = 1322978844800, which contains 22 as substring.

It is an unprimeable number.

813320 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10127 + ... + 10206.

2813320 is an apocalyptic number.

It is an amenable number.

813320 is an abundant number, since it is smaller than the sum of its proper divisors (1016740).

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

813320 is a wasteful number, since it uses less digits than its factorization.

813320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20344 (or 20340 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 813320 is about 901.8425583216. The cubic root of 813320 is about 93.3441597419.

Adding to 813320 its reverse (23318), we get a palindrome (836638).

The spelling of 813320 in words is "eight hundred thirteen thousand, three hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 20333 40666 81332 101665 162664 203330 406660 813320