Base | Representation |
---|---|
bin | 11010010000000000000000 |
3 | 110221121100020 |
4 | 122100000000 |
5 | 3230200110 |
6 | 403253440 |
7 | 112330020 |
oct | 32200000 |
9 | 13847306 |
10 | 6881280 |
11 | 398000a |
12 | 237a280 |
13 | 156c183 |
14 | cb1a80 |
15 | 90dd70 |
hex | 690000 |
6881280 has 136 divisors (see below), whose sum is σ = 25165632. Its totient is φ = 1572864.
The previous prime is 6881269. The next prime is 6881291. The reversal of 6881280 is 821886.
It is an interprime number because it is at equal distance from previous prime (6881269) and next prime (6881291).
It is a nialpdrome in base 8.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983037 + ... + 983043.
Almost surely, 26881280 is an apocalyptic number.
6881280 is a gapful number since it is divisible by the number (60) 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 6881280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12582816).
6881280 is an abundant number, since it is smaller than the sum of its proper divisors (18284352).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6881280 is an frugal number, since it uses more digits than its factorization.
6881280 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 47 (or 17 counting only the distinct ones).
The product of its (nonzero) digits is 6144, while the sum is 33.
The square root of 6881280 is about 2623.2193960857. The cubic root of 6881280 is about 190.2055024884.
The spelling of 6881280 in words is "six million, eight hundred eighty-one thousand, two hundred eighty".
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