| Base | Representation |
|---|---|
| bin | 111010100001101… |
| … | …011000111000000 |
| 3 | 2112102121222121120 |
| 4 | 322201223013000 |
| 5 | 4002331441411 |
| 6 | 241233352240 |
| 7 | 33222030201 |
| oct | 7241530700 |
| 9 | 2472558546 |
| 10 | 981905856 |
| 11 | 464295448 |
| 12 | 234a08680 |
| 13 | 1285733a9 |
| 14 | 9459b5a8 |
| 15 | 5b30a106 |
| hex | 3a86b1c0 |
981905856 has 112 divisors (see below), whose sum is σ = 2763097344. Its totient is φ = 306671616.
The previous prime is 981905851. The next prime is 981905891. The reversal of 981905856 is 658509189.
It is a super-2 number, since 2×9819058562 = 1928278220094185472, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (51).
It is a junction number, because it is equal to n+sod(n) for n = 981905799 and 981905808.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (981905851) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 923181 + ... + 924243.
It is an arithmetic number, because the mean of its divisors is an integer number (24670512).
Almost surely, 2981905856 is an apocalyptic number.
981905856 is a gapful number since it is divisible by the number (96) 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 981905856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1381548672).
981905856 is an abundant number, since it is smaller than the sum of its proper divisors (1781191488).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
981905856 is a wasteful number, since it uses less digits than its factorization.
981905856 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1378 (or 1368 counting only the distinct ones).
The product of its (nonzero) digits is 777600, while the sum is 51.
The square root of 981905856 is about 31335.3770680999. The cubic root of 981905856 is about 993.9318709572.
The spelling of 981905856 in words is "nine hundred eighty-one million, nine hundred five thousand, eight hundred fifty-six".
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