| Base | Representation |
|---|---|
| bin | 110101111000101… |
| … | …1011101010100100 |
| 3 | 11200000022001000100 |
| 4 | 1223301123222210 |
| 5 | 12200334323414 |
| 6 | 455230144100 |
| 7 | 62543525202 |
| oct | 15361335244 |
| 9 | 4600261010 |
| 10 | 1808120484 |
| 11 | 848700755 |
| 12 | 425652030 |
| 13 | 22a7a42a1 |
| 14 | 1321cc072 |
| 15 | a8b0e609 |
| hex | 6bc5baa4 |
1808120484 has 81 divisors (see below), whose sum is σ = 4836708513. Its totient is φ = 569454624.
The previous prime is 1808120471. The next prime is 1808120563. The reversal of 1808120484 is 4840218081.
It is a happy number.
The square root of 1808120484 is 42522.
It is a perfect power (a square), and thus also a powerful number.
1808120484 is a `hidden beast` number, since 1 + 80 + 81 + 20 + 484 = 666.
It can be written as a sum of positive squares in only one way, i.e., 982822500 + 825297984 = 31350^2 + 28728^2 .
It is a Harshad number since it is a multiple of its sum of digits (36).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4847322 + ... + 4847694.
Almost surely, 21808120484 is an apocalyptic number.
1808120484 is the 42522-nd square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1808120484
1808120484 is an abundant number, since it is smaller than the sum of its proper divisors (3028588029).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1808120484 is a wasteful number, since it uses less digits than its factorization.
1808120484 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 794 (or 397 counting only the distinct ones).
The product of its (nonzero) digits is 16384, while the sum is 36.
The cubic root of 1808120484 is about 1218.2669300996.
Multiplying 1808120484 by its sum of digits (36), we get a square (65092337424 = 2551322).
1808120484 divided by its sum of digits (36) gives a square (50225569 = 70872).
Multiplying 1808120484 by its product of nonzero digits (16384), we get a square (29624246009856 = 54428162).
The spelling of 1808120484 in words is "one billion, eight hundred eight million, one hundred twenty thousand, four hundred eighty-four".
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