Base | Representation |
---|---|
bin | 11010101101111001… |
… | …010101101001010000 |
3 | 2202001021012110220122 |
4 | 122231321111221100 |
5 | 432222421334013 |
6 | 21102340125412 |
7 | 2033616652523 |
oct | 325571255120 |
9 | 82037173818 |
10 | 28687293008 |
11 | 11191257920 |
12 | 5687396868 |
13 | 292242b3ba |
14 | 1561d7abba |
15 | b2d778a08 |
hex | 6ade55a50 |
28687293008 has 80 divisors (see below), whose sum is σ = 64303937856. Its totient is φ = 12253009920.
The previous prime is 28687292969. The next prime is 28687293043. The reversal of 28687293008 is 80039278682.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1946435 + ... + 1961117.
Almost surely, 228687293008 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 28687293008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32151968928).
28687293008 is an abundant number, since it is smaller than the sum of its proper divisors (35616644848).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28687293008 is a wasteful number, since it uses less digits than its factorization.
28687293008 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15372 (or 15366 counting only the distinct ones).
The product of its (nonzero) digits is 2322432, while the sum is 53.
The spelling of 28687293008 in words is "twenty-eight billion, six hundred eighty-seven million, two hundred ninety-three thousand, eight".
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