Search a number
BaseRepresentation
bin111000011100111
31110122111
413003213
51411103
6341451
7150160
oct70347
943574
1028903
111a796
1214887
1310204
14a767
15886d
hex70e7

28903 has 4 divisors (see below), whose sum is σ = 33040. Its totient is φ = 24768.

The previous prime is 28901. The next prime is 28909. The reversal of 28903 is 30982.

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 28903 - 21 = 28901 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28901) 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, 2058 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (8260).

228903 is an apocalyptic number.

28903 is a deficient number, since it is larger than the sum of its proper divisors (4137).

28903 is an equidigital number, since it uses as much as digits as its factorization.

28903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 28903 is about 170.0088233004. The cubic root of 28903 is about 30.6888754269.

The spelling of 28903 in words is "twenty-eight thousand, nine hundred three".

Divisors: 1 7 4129 28903