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28154 = 272011
BaseRepresentation
bin110110111111010
31102121202
412313322
51400104
6334202
7145040
oct66772
942552
1028154
111a175
1214362
13ca79
14a390
15851e
hex6dfa

28154 has 8 divisors (see below), whose sum is σ = 48288. Its totient is φ = 12060.

The previous prime is 28151. The next prime is 28163. The reversal of 28154 is 45182.

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

It is not an unprimeable number, because it can be changed into a prime (28151) 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, 992 + ... + 1019.

It is an arithmetic number, because the mean of its divisors is an integer number (6036).

228154 is an apocalyptic number.

28154 is a deficient number, since it is larger than the sum of its proper divisors (20134).

28154 is a wasteful number, since it uses less digits than its factorization.

28154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020.

The product of its digits is 320, while the sum is 20.

The square root of 28154 is about 167.7915373313. The cubic root of 28154 is about 30.4214587642.

The spelling of 28154 in words is "twenty-eight thousand, one hundred fifty-four".

Divisors: 1 2 7 14 2011 4022 14077 28154