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28699 = 112609
BaseRepresentation
bin111000000011011
31110100221
413000123
51404244
6340511
7146446
oct70033
943327
1028699
111a620
1214737
13100a8
14a65d
158784
hex701b

28699 has 4 divisors (see below), whose sum is σ = 31320. Its totient is φ = 26080.

The previous prime is 28697. The next prime is 28703. The reversal of 28699 is 99682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28699 - 21 = 28697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28697) by changing a digit.

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, 1294 + ... + 1315.

It is an arithmetic number, because the mean of its divisors is an integer number (7830).

228699 is an apocalyptic number.

28699 is a deficient number, since it is larger than the sum of its proper divisors (2621).

28699 is a wasteful number, since it uses less digits than its factorization.

28699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620.

The product of its digits is 7776, while the sum is 34.

The square root of 28699 is about 169.4077920286. The cubic root of 28699 is about 30.6165032655.

It can be divided in two parts, 28 and 699, that added together give a palindrome (727).

The spelling of 28699 in words is "twenty-eight thousand, six hundred ninety-nine".

Divisors: 1 11 2609 28699