Search a number
28030 = 252803
BaseRepresentation
bin110110101111110
31102110011
412311332
51344110
6333434
7144502
oct66576
942404
1028030
111a072
121427a
13c9b2
14a302
15848a
hex6d7e

28030 has 8 divisors (see below), whose sum is σ = 50472. Its totient is φ = 11208.

The previous prime is 28027. The next prime is 28031. The reversal of 28030 is 3082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28031) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1392 + ... + 1411.

It is an arithmetic number, because the mean of its divisors is an integer number (6309).

228030 is an apocalyptic number.

28030 is a deficient number, since it is larger than the sum of its proper divisors (22442).

28030 is a wasteful number, since it uses less digits than its factorization.

28030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 28030 is about 167.4216234541. The cubic root of 28030 is about 30.3767308085.

The spelling of 28030 in words is "twenty-eight thousand, thirty".

Divisors: 1 2 5 10 2803 5606 14015 28030