Base | Representation |
---|---|
bin | 110110000000100… |
… | …1110011111001000 |
3 | 11200022002101110200 |
4 | 1230001032133020 |
5 | 12202414321213 |
6 | 455455012200 |
7 | 62623651131 |
oct | 15401163710 |
9 | 4608071420 |
10 | 1812260808 |
11 | 84aa79406 |
12 | 426b0a060 |
13 | 22b5c3997 |
14 | 132988c88 |
15 | a917b273 |
hex | 6c04e7c8 |
1812260808 has 108 divisors (see below), whose sum is σ = 5112844035. Its totient is φ = 579884928.
The previous prime is 1812260783. The next prime is 1812260861. The reversal of 1812260808 is 8080622181.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 5 ways, for example, as 1672973604 + 139287204 = 40902^2 + 11802^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=30102.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is an unprimeable number.
It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10475410 + ... + 10475582.
Almost surely, 21812260808 is an apocalyptic number.
1812260808 is a gapful number since it is divisible by the number (18) 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 1812260808
1812260808 is an abundant number, since it is smaller than the sum of its proper divisors (3300583227).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1812260808 is a wasteful number, since it uses less digits than its factorization.
1812260808 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 416 (or 207 counting only the distinct ones).
The product of its (nonzero) digits is 12288, while the sum is 36.
The square root of 1812260808 is about 42570.6566545549. The cubic root of 1812260808 is about 1219.1961039256.
Adding to 1812260808 its reverse (8080622181), we get a palindrome (9892882989).
The spelling of 1812260808 in words is "one billion, eight hundred twelve million, two hundred sixty thousand, eight hundred eight".
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