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27890 = 252789
BaseRepresentation
bin110110011110010
31102020222
412303302
51343030
6333042
7144212
oct66362
942228
1027890
1119a55
1214182
13c905
14a242
1583e5
hex6cf2

27890 has 8 divisors (see below), whose sum is σ = 50220. Its totient is φ = 11152.

The previous prime is 27883. The next prime is 27893. The reversal of 27890 is 9872.

It is a Cunningham number, because it is equal to 1672+1.

It can be written as a sum of positive squares in 2 ways, for example, as 27889 + 1 = 167^2 + 1^2 .

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

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (27893) 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, 1385 + ... + 1404.

227890 is an apocalyptic number.

27890 is a deficient number, since it is larger than the sum of its proper divisors (22330).

27890 is a wasteful number, since it uses less digits than its factorization.

27890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 27890 is about 167.0029939851. The cubic root of 27890 is about 30.3260726762.

The spelling of 27890 in words is "twenty-seven thousand, eight hundred ninety".

Divisors: 1 2 5 10 2789 5578 13945 27890