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28539 = 337151
BaseRepresentation
bin110111101111011
31110011000
412331323
51403124
6340043
7146130
oct67573
943130
1028539
111a495
1214623
13ccb4
14a587
1586c9
hex6f7b

28539 has 16 divisors (see below), whose sum is σ = 48640. Its totient is φ = 16200.

The previous prime is 28537. The next prime is 28541. The reversal of 28539 is 93582.

28539 is nontrivially palindromic in base 2 and base 6.

It is an interprime number because it is at equal distance from previous prime (28537) and next prime (28541).

It is not a de Polignac number, because 28539 - 21 = 28537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114 + ... + 264.

It is an arithmetic number, because the mean of its divisors is an integer number (3040).

228539 is an apocalyptic number.

28539 is a deficient number, since it is larger than the sum of its proper divisors (20101).

28539 is a wasteful number, since it uses less digits than its factorization.

28539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 161 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 28539 is about 168.9348987036. The cubic root of 28539 is about 30.5595004396.

It can be divided in two parts, 285 and 39, that added together give a square (324 = 182).

The spelling of 28539 in words is "twenty-eight thousand, five hundred thirty-nine".

Divisors: 1 3 7 9 21 27 63 151 189 453 1057 1359 3171 4077 9513 28539