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28625 = 53229
BaseRepresentation
bin110111111010001
31110021012
412333101
51404000
6340305
7146312
oct67721
943235
1028625
111a563
1214695
131004c
14a609
158735
hex6fd1

28625 has 8 divisors (see below), whose sum is σ = 35880. Its totient is φ = 22800.

The previous prime is 28621. The next prime is 28627. The reversal of 28625 is 52682.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 64 + 28561 = 8^2 + 169^2 .

It is not a de Polignac number, because 28625 - 22 = 28621 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28625.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11 + ... + 239.

It is an arithmetic number, because the mean of its divisors is an integer number (4485).

228625 is an apocalyptic number.

28625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28625 is a deficient number, since it is larger than the sum of its proper divisors (7255).

28625 is an equidigital number, since it uses as much as digits as its factorization.

28625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 234 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 28625 is about 169.1892431569. The cubic root of 28625 is about 30.5901658632.

The spelling of 28625 in words is "twenty-eight thousand, six hundred twenty-five".

Divisors: 1 5 25 125 229 1145 5725 28625