Base | Representation |
---|---|
bin | 11010000110100110… |
… | …110010000001000000 |
3 | 2200100022211212111111 |
4 | 122012212302001000 |
5 | 424400144221211 |
6 | 20513111453104 |
7 | 2011364030662 |
oct | 320646620100 |
9 | 80308755444 |
10 | 28028117056 |
11 | 10983161205 |
12 | 5522687194 |
13 | 28489b3964 |
14 | 14dc5cc532 |
15 | ae096c421 |
hex | 6869b2040 |
28028117056 has 63 divisors (see below), whose sum is σ = 59130444477. Its totient is φ = 13178987520.
The previous prime is 28028116979. The next prime is 28028117071. The reversal of 28028117056 is 65071182082.
The square root of 28028117056 is 167416.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in only one way, i.e., 21821198400 + 6206918656 = 147720^2 + 78784^2 .
It is a super-4 number, since 4×280281170564 (a number of 43 digits) contains 4444 as substring.
It is a Duffinian number.
It is an unprimeable number.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22767961 + ... + 22769191.
Almost surely, 228028117056 is an apocalyptic number.
28028117056 is the 167416-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 28028117056
28028117056 is an abundant number, since it is smaller than the sum of its proper divisors (31102327421).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28028117056 is an frugal number, since it uses more digits than its factorization.
28028117056 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2508 (or 1250 counting only the distinct ones).
The product of its (nonzero) digits is 53760, while the sum is 40.
The spelling of 28028117056 in words is "twenty-eight billion, twenty-eight million, one hundred seventeen thousand, fifty-six".
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