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28727 = 231249
BaseRepresentation
bin111000000110111
31110101222
413000313
51404402
6340555
7146516
oct70067
943358
1028727
111a646
121475b
13100ca
14a67d
1587a2
hex7037

28727 has 4 divisors (see below), whose sum is σ = 30000. Its totient is φ = 27456.

The previous prime is 28723. The next prime is 28729. The reversal of 28727 is 72782.

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 28727 - 22 = 28723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28696 and 28705.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28727.

It is not an unprimeable number, because it can be changed into a prime (28723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602 + ... + 647.

It is an arithmetic number, because the mean of its divisors is an integer number (7500).

228727 is an apocalyptic number.

28727 is a deficient number, since it is larger than the sum of its proper divisors (1273).

28727 is a wasteful number, since it uses less digits than its factorization.

28727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272.

The product of its digits is 1568, while the sum is 26.

The square root of 28727 is about 169.4904127082. The cubic root of 28727 is about 30.6264569625.

The spelling of 28727 in words is "twenty-eight thousand, seven hundred twenty-seven".

Divisors: 1 23 1249 28727