Base | Representation |
---|---|
bin | 110101100000… |
… | …1001100000110 |
3 | 1221210022020100 |
4 | 1223001030012 |
5 | 24140214103 |
6 | 2441144530 |
7 | 460312620 |
oct | 153011406 |
9 | 57708210 |
10 | 28054278 |
11 | 1492165a |
12 | 948b146 |
13 | 5a73485 |
14 | 3a23c10 |
15 | 26e25a3 |
hex | 1ac1306 |
28054278 has 48 divisors (see below), whose sum is σ = 70795296. Its totient is φ = 7862400.
The previous prime is 28054277. The next prime is 28054303. The reversal of 28054278 is 87245082.
It is a happy number.
It is a Curzon number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (28054277) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4578 + ... + 8778.
It is an arithmetic number, because the mean of its divisors is an integer number (1474902).
Almost surely, 228054278 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 28054278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35397648).
28054278 is an abundant number, since it is smaller than the sum of its proper divisors (42741018).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
28054278 is a wasteful number, since it uses less digits than its factorization.
28054278 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4269 (or 4266 counting only the distinct ones).
The product of its (nonzero) digits is 35840, while the sum is 36.
The square root of 28054278 is about 5296.6289279125. The cubic root of 28054278 is about 303.8549847942.
The spelling of 28054278 in words is "twenty-eight million, fifty-four thousand, two hundred seventy-eight".
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