| Base | Representation |
|---|---|
| bin | 10101100011011… |
| … | …10110101000100 |
| 3 | 110121020001100200 |
| 4 | 22301232311010 |
| 5 | 332241342103 |
| 6 | 25535210500 |
| 7 | 4323565011 |
| oct | 1261566504 |
| 9 | 417201320 |
| 10 | 180809028 |
| 11 | 93075554 |
| 12 | 50676a30 |
| 13 | 2b5c81ba |
| 14 | 1a028708 |
| 15 | 10d180a3 |
| hex | ac6ed44 |
180809028 has 72 divisors (see below), whose sum is σ = 468363168. Its totient is φ = 58796928.
The previous prime is 180809021. The next prime is 180809029. The reversal of 180809028 is 820908081.
180809028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 180808983 and 180809001.
It is not an unprimeable number, because it can be changed into a prime (180809021) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 280875 + ... + 281517.
It is an arithmetic number, because the mean of its divisors is an integer number (6505044).
Almost surely, 2180809028 is an apocalyptic number.
180809028 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 180809028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234181584).
180809028 is an abundant number, since it is smaller than the sum of its proper divisors (287554140).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
180809028 is a wasteful number, since it uses less digits than its factorization.
180809028 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 833 (or 828 counting only the distinct ones).
The product of its (nonzero) digits is 9216, while the sum is 36.
The square root of 180809028 is about 13446.5247554898. The cubic root of 180809028 is about 565.4662692393.
The spelling of 180809028 in words is "one hundred eighty million, eight hundred nine thousand, twenty-eight".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •