| Base | Representation |
|---|---|
| bin | 110111011101110… |
| … | …0100010110010000 |
| 3 | 11210201000010210000 |
| 4 | 1232323210112100 |
| 5 | 12302420443021 |
| 6 | 504402010000 |
| 7 | 64056111105 |
| oct | 15673442620 |
| 9 | 4721003700 |
| 10 | 1861109136 |
| 11 | 875602927 |
| 12 | 43b346900 |
| 13 | 238767b13 |
| 14 | 139262aac |
| 15 | ad5c9b26 |
| hex | 6eee4590 |
1861109136 has 150 divisors (see below), whose sum is σ = 5723238290. Its totient is φ = 583759872.
The previous prime is 1861109111. The next prime is 1861109137. The reversal of 1861109136 is 6319011681.
It is a happy number.
1861109136 is a `hidden beast` number, since 1 + 8 + 611 + 0 + 9 + 1 + 36 = 666.
It can be written as a sum of positive squares in 3 ways, for example, as 472801536 + 1388307600 = 21744^2 + 37260^2 .
It is a super-2 number, since 2×18611091362 = 6927454432205332992, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a self number, because there is not a number n which added to its sum of digits gives 1861109136.
It is not an unprimeable number, because it can be changed into a prime (1861109137) by changing a digit.
It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 372060 + ... + 377028.
Almost surely, 21861109136 is an apocalyptic number.
1861109136 is a gapful number since it is divisible by the number (16) 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 1861109136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2861619145).
1861109136 is an abundant number, since it is smaller than the sum of its proper divisors (3862129154).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1861109136 is a wasteful number, since it uses less digits than its factorization.
1861109136 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5023 (or 4991 counting only the distinct ones).
The product of its (nonzero) digits is 7776, while the sum is 36.
The square root of 1861109136 is about 43140.5741269168. The cubic root of 1861109136 is about 1230.0533468831.
The spelling of 1861109136 in words is "one billion, eight hundred sixty-one million, one hundred nine thousand, one hundred thirty-six".
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