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288613 = 131492
BaseRepresentation
bin1000110011101100101
3112122220101
41012131211
533213423
610104101
72311303
oct1063545
9478811
10288613
11187926
1211b031
13a14a0
1477273
155a7ad
hex46765

288613 has 6 divisors (see below), whose sum is σ = 312914. Its totient is φ = 264624.

The previous prime is 288583. The next prime is 288647. The reversal of 288613 is 316882.

It can be written as a sum of positive squares in 3 ways, for example, as 16129 + 272484 = 127^2 + 522^2 .

It is a de Polignac number, because none of the positive numbers 2k-288613 is a prime.

It is a Duffinian number.

288613 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (288653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1863 + ... + 2011.

2288613 is an apocalyptic number.

It is an amenable number.

288613 is a deficient number, since it is larger than the sum of its proper divisors (24301).

288613 is an equidigital number, since it uses as much as digits as its factorization.

288613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 162 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 288613 is about 537.2271400441. The cubic root of 288613 is about 66.0853655110.

The spelling of 288613 in words is "two hundred eighty-eight thousand, six hundred thirteen".

Divisors: 1 13 149 1937 22201 288613