| Base | Representation |
|---|---|
| bin | 110000111111110… |
| … | …1011010001100000 |
| 3 | 11020120122000220000 |
| 4 | 1201333223101200 |
| 5 | 11331341113042 |
| 6 | 431050220000 |
| 7 | 55512316530 |
| oct | 14177532140 |
| 9 | 4216560800 |
| 10 | 1644082272 |
| 11 | 774050388 |
| 12 | 39a724600 |
| 13 | 2027cb761 |
| 14 | 1184cb4c0 |
| 15 | 9950a74c |
| hex | 61feb460 |
1644082272 has 480 divisors, whose sum is σ = 5932523520. Its totient is φ = 436700160.
The previous prime is 1644082213. The next prime is 1644082277. The reversal of 1644082272 is 2722804461.
1644082272 is a `hidden beast` number, since 1 + 644 + 0 + 8 + 2 + 2 + 7 + 2 = 666.
1644082272 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.
It is a super-3 number, since 3×16440822723 (a number of 29 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1644082277) by changing a digit.
It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 20811129 + ... + 20811207.
It is an arithmetic number, because the mean of its divisors is an integer number (12359424).
Almost surely, 21644082272 is an apocalyptic number.
1644082272 is a gapful number since it is divisible by the number (12) 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 1644082272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2966261760).
1644082272 is an abundant number, since it is smaller than the sum of its proper divisors (4288441248).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1644082272 is a wasteful number, since it uses less digits than its factorization.
1644082272 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 176 (or 159 counting only the distinct ones).
The product of its (nonzero) digits is 43008, while the sum is 36.
The square root of 1644082272 is about 40547.2843973551. The cubic root of 1644082272 is about 1180.2513761112.
The spelling of 1644082272 in words is "one billion, six hundred forty-four million, eighty-two thousand, two hundred seventy-two".
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