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28550 = 252571
BaseRepresentation
bin110111110000110
31110011102
412332012
51403200
6340102
7146144
oct67606
943142
1028550
111a4a5
1214632
13ccc2
14a594
1586d5
hex6f86

28550 has 12 divisors (see below), whose sum is σ = 53196. Its totient is φ = 11400.

The previous prime is 28549. The next prime is 28559. The reversal of 28550 is 5582.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28559) 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, 236 + ... + 335.

It is an arithmetic number, because the mean of its divisors is an integer number (4433).

228550 is an apocalyptic number.

28550 is a deficient number, since it is larger than the sum of its proper divisors (24646).

28550 is a wasteful number, since it uses less digits than its factorization.

28550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 28550 is about 168.9674524872. The cubic root of 28550 is about 30.5634261941.

It can be divided in two parts, 28 and 550, that multiplied together give a triangular number (15400 = T175).

The spelling of 28550 in words is "twenty-eight thousand, five hundred fifty".

Divisors: 1 2 5 10 25 50 571 1142 2855 5710 14275 28550