Base | Representation |
---|---|
bin | 11010001001100111… |
… | …110100110100101010 |
3 | 2200110212001212220111 |
4 | 122021213310310222 |
5 | 430001123103341 |
6 | 20522120244534 |
7 | 2012550126163 |
oct | 321147646452 |
9 | 80425055814 |
10 | 28078722346 |
11 | 109a9785764 |
12 | 553761074a |
13 | 285632170c |
14 | 150520276a |
15 | ae5116681 |
hex | 6899f4d2a |
28078722346 has 4 divisors (see below), whose sum is σ = 42118083522. Its totient is φ = 14039361172.
The previous prime is 28078722341. The next prime is 28078722359. The reversal of 28078722346 is 64322787082.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in only one way, i.e., 14625274225 + 13453448121 = 120935^2 + 115989^2 .
It is a super-3 number, since 3×280787223463 (a number of 32 digits) contains 333 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 28078722346.
It is not an unprimeable number, because it can be changed into a prime (28078722341) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7019680585 + ... + 7019680588.
Almost surely, 228078722346 is an apocalyptic number.
28078722346 is a deficient number, since it is larger than the sum of its proper divisors (14039361176).
28078722346 is a wasteful number, since it uses less digits than its factorization.
28078722346 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 14039361175.
The product of its (nonzero) digits is 1806336, while the sum is 49.
The spelling of 28078722346 in words is "twenty-eight billion, seventy-eight million, seven hundred twenty-two thousand, three hundred forty-six".
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