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28653 = 39551
BaseRepresentation
bin110111111101101
31110022020
412333231
51404103
6340353
7146352
oct67755
943266
1028653
111a589
12146b9
1310071
14a629
158753
hex6fed

28653 has 4 divisors (see below), whose sum is σ = 38208. Its totient is φ = 19100.

The previous prime is 28649. The next prime is 28657. The reversal of 28653 is 35682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (28649) and next prime (28657).

It is a cyclic number.

It is not a de Polignac number, because 28653 - 22 = 28649 is a prime.

It is a D-number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28657) 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, 4773 + ... + 4778.

It is an arithmetic number, because the mean of its divisors is an integer number (9552).

228653 is an apocalyptic number.

It is an amenable number.

28653 is a deficient number, since it is larger than the sum of its proper divisors (9555).

28653 is an equidigital number, since it uses as much as digits as its factorization.

28653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554.

The product of its digits is 1440, while the sum is 24.

The square root of 28653 is about 169.2719705090. The cubic root of 28653 is about 30.6001366989.

The spelling of 28653 in words is "twenty-eight thousand, six hundred fifty-three".

Divisors: 1 3 9551 28653