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289864 = 23191907
BaseRepresentation
bin1000110110001001000
3112201121201
41012301020
533233424
610113544
72315041
oct1066110
9481551
10289864
11188863
1211b8b4
13a1c23
14778c8
155ad44
hex46c48

289864 has 16 divisors (see below), whose sum is σ = 572400. Its totient is φ = 137232.

The previous prime is 289859. The next prime is 289871. The reversal of 289864 is 468982.

289864 = T71 + T72 + ... + T127.

It is a super-2 number, since 2×2898642 = 168042276992, which contains 22 as substring.

It is an unprimeable number.

289864 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 802 + ... + 1105.

It is an arithmetic number, because the mean of its divisors is an integer number (35775).

2289864 is an apocalyptic number.

It is an amenable number.

289864 is a deficient number, since it is larger than the sum of its proper divisors (282536).

289864 is a wasteful number, since it uses less digits than its factorization.

289864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932 (or 1928 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 289864 is about 538.3901930756. The cubic root of 289864 is about 66.1807107542.

The spelling of 289864 in words is "two hundred eighty-nine thousand, eight hundred sixty-four".

Divisors: 1 2 4 8 19 38 76 152 1907 3814 7628 15256 36233 72466 144932 289864