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80289 = 3211811
BaseRepresentation
bin10011100110100001
311002010200
4103212201
510032124
61415413
7453036
oct234641
9132120
1080289
1155360
123a569
132a711
142138d
1518bc9
hex139a1

80289 has 12 divisors (see below), whose sum is σ = 126672. Its totient is φ = 48600.

The previous prime is 80287. The next prime is 80309. The reversal of 80289 is 98208.

It is not a de Polignac number, because 80289 - 21 = 80287 is a prime.

It is a d-powerful number, because it can be written as 84 + 0 + 216 + 84 + 94 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307 + ... + 504.

It is an arithmetic number, because the mean of its divisors is an integer number (10556).

280289 is an apocalyptic number.

It is an amenable number.

80289 is a deficient number, since it is larger than the sum of its proper divisors (46383).

80289 is a wasteful number, since it uses less digits than its factorization.

80289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 80289 is about 283.3531365628. The cubic root of 80289 is about 43.1405174152.

The spelling of 80289 in words is "eighty thousand, two hundred eighty-nine".

Divisors: 1 3 9 11 33 99 811 2433 7299 8921 26763 80289