Base | Representation |
---|---|
bin | 1100110001011110010010… |
… | …10010101000011101100001 |
3 | 10200110012110201222020112022 |
4 | 12120233021102220131201 |
5 | 12140144032033101111 |
6 | 135423305405511225 |
7 | 5626205664565223 |
oct | 630571122503541 |
9 | 120405421866468 |
10 | 28088168253281 |
11 | 8a4a1417a39a4 |
12 | 3197812872515 |
13 | 128991a373066 |
14 | 6d169041a413 |
15 | 33a98744d2db |
hex | 198bc94a8761 |
28088168253281 has 8 divisors (see below), whose sum is σ = 28138243127400. Its totient is φ = 28038125411712.
The previous prime is 28088168253247. The next prime is 28088168253293. The reversal of 28088168253281 is 18235286188082.
It is a happy number.
It can be written as a sum of positive squares in 4 ways, for example, as 19194717025 + 28068973536256 = 138545^2 + 5298016^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 28088168253281 - 210 = 28088168252257 is a prime.
It is a super-2 number, since 2×280881682532812 (a number of 28 digits) contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (28088168253781) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6252506 + ... + 9760643.
It is an arithmetic number, because the mean of its divisors is an integer number (3517280390925).
Almost surely, 228088168253281 is an apocalyptic number.
It is an amenable number.
28088168253281 is a deficient number, since it is larger than the sum of its proper divisors (50074874119).
28088168253281 is a wasteful number, since it uses less digits than its factorization.
28088168253281 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 16016275.
The product of its (nonzero) digits is 23592960, while the sum is 62.
The spelling of 28088168253281 in words is "twenty-eight trillion, eighty-eight billion, one hundred sixty-eight million, two hundred fifty-three thousand, two hundred eighty-one".
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