Base | Representation |
---|---|
bin | 10110100111001… |
… | …10001110001000 |
3 | 111012221002012000 |
4 | 23103212032020 |
5 | 342024433124 |
6 | 30453351000 |
7 | 4462211226 |
oct | 1323461610 |
9 | 435832160 |
10 | 189686664 |
11 | 98089442 |
12 | 53638460 |
13 | 303b5c3b |
14 | 1b299b16 |
15 | 119bd6c9 |
hex | b4e6388 |
189686664 has 64 divisors (see below), whose sum is σ = 539784000. Its totient is φ = 61683840.
The previous prime is 189686657. The next prime is 189686669. The reversal of 189686664 is 466686981.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a nude number because it is divisible by every one of its digits.
It is a self number, because there is not a number n which added to its sum of digits gives 189686664.
It is not an unprimeable number, because it can be changed into a prime (189686669) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1854 + ... + 19565.
It is an arithmetic number, because the mean of its divisors is an integer number (8434125).
Almost surely, 2189686664 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 189686664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269892000).
189686664 is an abundant number, since it is smaller than the sum of its proper divisors (350097336).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
189686664 is a wasteful number, since it uses less digits than its factorization.
189686664 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 21475 (or 21465 counting only the distinct ones).
The product of its digits is 2985984, while the sum is 54.
The square root of 189686664 is about 13772.6781709296. The cubic root of 189686664 is about 574.5735100804.
The spelling of 189686664 in words is "one hundred eighty-nine million, six hundred eighty-six thousand, six hundred sixty-four".
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