| Base | Representation |
|---|---|
| bin | 111000010100111… |
| … | …1111010100010000 |
| 3 | 11212201110202122100 |
| 4 | 1300221333110100 |
| 5 | 12332323233230 |
| 6 | 511314240400 |
| 7 | 64560130500 |
| oct | 16051772420 |
| 9 | 4781422570 |
| 10 | 1890055440 |
| 11 | 88a983699 |
| 12 | 448b86100 |
| 13 | 241761300 |
| 14 | 13d039a00 |
| 15 | b0de6660 |
| hex | 70a7f510 |
1890055440 has 540 divisors, whose sum is σ = 8020646244. Its totient is φ = 397522944.
The previous prime is 1890055439. The next prime is 1890055441. The reversal of 1890055440 is 445500981.
1890055440 is a `hidden beast` number, since 18 + 90 + 0 + 554 + 4 + 0 = 666.
It is an interprime number because it is at equal distance from previous prime (1890055439) and next prime (1890055441).
It can be written as a sum of positive squares in 6 ways, for example, as 849605904 + 1040449536 = 29148^2 + 32256^2 .
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 = 1890055395 and 1890055404.
It is not an unprimeable number, because it can be changed into a prime (1890055441) by changing a digit.
It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 5962162 + ... + 5962478.
Almost surely, 21890055440 is an apocalyptic number.
1890055440 is a gapful number since it is divisible by the number (10) 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 1890055440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4010323122).
1890055440 is an abundant number, since it is smaller than the sum of its proper divisors (6130590804).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1890055440 is a wasteful number, since it uses less digits than its factorization.
1890055440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 376 (or 347 counting only the distinct ones).
The product of its (nonzero) digits is 28800, while the sum is 36.
The square root of 1890055440 is about 43474.7678544693. The cubic root of 1890055440 is about 1236.3976789279.
The spelling of 1890055440 in words is "one billion, eight hundred ninety million, fifty-five thousand, four hundred forty".
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