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189000 = 2333537
BaseRepresentation
bin101110001001001000
3100121021000
4232021020
522022000
64015000
71415010
oct561110
9317230
10189000
11119aa9
1291460
1368046
144cc40
153b000
hex2e248

189000 has 128 divisors (see below), whose sum is σ = 748800. Its totient is φ = 43200.

The previous prime is 188999. The next prime is 189011. The reversal of 189000 is 981.

189000 = 63 + 73 + ... + 293.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26997 + ... + 27003.

It is an arithmetic number, because the mean of its divisors is an integer number (5850).

2189000 is an apocalyptic number.

189000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374400).

189000 is an abundant number, since it is smaller than the sum of its proper divisors (559800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189000 is a wasteful number, since it uses less digits than its factorization.

189000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 189000 is about 434.7413023857. The cubic root of 189000 is about 57.3879354832.

Adding to 189000 its reverse (981), we get a palindrome (189981).

The spelling of 189000 in words is "one hundred eighty-nine thousand".

Divisors: 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 25 27 28 30 35 36 40 42 45 50 54 56 60 63 70 72 75 84 90 100 105 108 120 125 126 135 140 150 168 175 180 189 200 210 216 225 250 252 270 280 300 315 350 360 375 378 420 450 500 504 525 540 600 630 675 700 750 756 840 875 900 945 1000 1050 1080 1125 1260 1350 1400 1500 1512 1575 1750 1800 1890 2100 2250 2520 2625 2700 3000 3150 3375 3500 3780 4200 4500 4725 5250 5400 6300 6750 7000 7560 7875 9000 9450 10500 12600 13500 15750 18900 21000 23625 27000 31500 37800 47250 63000 94500 189000