Base | Representation |
---|---|
bin | 11010111011001110… |
… | …101101101101101010 |
3 | 2202121212010222210120 |
4 | 122323032231231222 |
5 | 433202204003201 |
6 | 21140451024110 |
7 | 2042304306660 |
oct | 327316555552 |
9 | 82555128716 |
10 | 28911000426 |
11 | 11296562590 |
12 | 572a29b036 |
13 | 2959896459 |
14 | 1583970c30 |
15 | b43217536 |
hex | 6bb3adb6a |
28911000426 has 64 divisors (see below), whose sum is σ = 72210410496. Its totient is φ = 7496784000.
The previous prime is 28911000407. The next prime is 28911000439. The reversal of 28911000426 is 62400011982.
It is a super-3 number, since 3×289110004263 (a number of 32 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (33).
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225601 + ... + 329723.
It is an arithmetic number, because the mean of its divisors is an integer number (1128287664).
Almost surely, 228911000426 is an apocalyptic number.
28911000426 is the 138831-st pentagonal number.
It is a practical number, because each smaller number is the sum of distinct divisors of 28911000426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36105205248).
28911000426 is an abundant number, since it is smaller than the sum of its proper divisors (43299410070).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28911000426 is a wasteful number, since it uses less digits than its factorization.
28911000426 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 104747.
The product of its (nonzero) digits is 6912, while the sum is 33.
The spelling of 28911000426 in words is "twenty-eight billion, nine hundred eleven million, four hundred twenty-six", and thus it is an aban number.
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.160 sec. • engine limits •