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28438 = 259241
BaseRepresentation
bin110111100010110
31110000021
412330112
51402223
6335354
7145624
oct67426
943007
1028438
111a403
121455a
13cc37
14a514
15865d
hex6f16

28438 has 8 divisors (see below), whose sum is σ = 43560. Its totient is φ = 13920.

The previous prime is 28433. The next prime is 28439. The reversal of 28438 is 83482.

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

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28433) 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, 3 + ... + 238.

It is an arithmetic number, because the mean of its divisors is an integer number (5445).

228438 is an apocalyptic number.

28438 is a deficient number, since it is larger than the sum of its proper divisors (15122).

28438 is a wasteful number, since it uses less digits than its factorization.

28438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302.

The product of its digits is 1536, while the sum is 25.

The square root of 28438 is about 168.6357020325. The cubic root of 28438 is about 30.5234076333.

The spelling of 28438 in words is "twenty-eight thousand, four hundred thirty-eight".

Divisors: 1 2 59 118 241 482 14219 28438