| Base | Representation |
|---|---|
| bin | 100110010000100… |
| … | …1111000100010000 |
| 3 | 10022110122211022000 |
| 4 | 1030201033010100 |
| 5 | 10112121442010 |
| 6 | 331215514000 |
| 7 | 43545646254 |
| oct | 11441170420 |
| 9 | 3273584260 |
| 10 | 1283780880 |
| 11 | 5a972a638 |
| 12 | 2b9b28900 |
| 13 | 175c79775 |
| 14 | c26dc264 |
| 15 | 77a897c0 |
| hex | 4c84f110 |
1283780880 has 160 divisors (see below), whose sum is σ = 4614347520. Its totient is φ = 327444480.
The previous prime is 1283780879. The next prime is 1283780881. The reversal of 1283780880 is 880873821.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (1283780879) and next prime (1283780881).
It is a Harshad number since it is a multiple of its sum of digits (45).
It is not an unprimeable number, because it can be changed into a prime (1283780881) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36760 + ... + 62600.
It is an arithmetic number, because the mean of its divisors is an integer number (28839672).
Almost surely, 21283780880 is an apocalyptic number.
1283780880 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 1283780880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2307173760).
1283780880 is an abundant number, since it is smaller than the sum of its proper divisors (3330566640).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1283780880 is a wasteful number, since it uses less digits than its factorization.
1283780880 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 25886 (or 25874 counting only the distinct ones).
The product of its (nonzero) digits is 172032, while the sum is 45.
The square root of 1283780880 is about 35829.8880824375. Note that the first 3 decimals coincide. The cubic root of 1283780880 is about 1086.8350465282.
The spelling of 1283780880 in words is "one billion, two hundred eighty-three million, seven hundred eighty thousand, eight hundred eighty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.073 sec. • engine limits •