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28525 = 527163
BaseRepresentation
bin110111101101101
31110010111
412331231
51403100
6340021
7146110
oct67555
943114
1028525
111a482
1214611
13cca3
14a577
1586ba
hex6f6d

28525 has 12 divisors (see below), whose sum is σ = 40672. Its totient is φ = 19440.

The previous prime is 28517. The next prime is 28537. The reversal of 28525 is 52582.

28525 = 212 + 222 + ... + 452.

It is not a de Polignac number, because 28525 - 23 = 28517 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

28525 is a lucky number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 28496 and 28505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94 + ... + 256.

228525 is an apocalyptic number.

28525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28525 is a deficient number, since it is larger than the sum of its proper divisors (12147).

28525 is a wasteful number, since it uses less digits than its factorization.

28525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 175 counting only the distinct ones).

The product of its digits is 800, while the sum is 22.

The square root of 28525 is about 168.8934575405. The cubic root of 28525 is about 30.5545025655.

The spelling of 28525 in words is "twenty-eight thousand, five hundred twenty-five".

Divisors: 1 5 7 25 35 163 175 815 1141 4075 5705 28525