Base | Representation |
---|---|
bin | 11000001101101… |
… | …11111110100100 |
3 | 112011020000020200 |
4 | 30012313332210 |
5 | 404000104430 |
6 | 32053430500 |
7 | 5014365033 |
oct | 1406677644 |
9 | 464200220 |
10 | 203128740 |
11 | a472a6a1 |
12 | 5803b430 |
13 | 33111429 |
14 | 1cd9871a |
15 | 12c76460 |
hex | c1b7fa4 |
203128740 has 144 divisors (see below), whose sum is σ = 647861760. Its totient is φ = 51448320.
The previous prime is 203128727. The next prime is 203128741. The reversal of 203128740 is 47821302.
It is a super-2 number, since 2×2031287402 = 82522570027975200, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (203128741) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 328912 + ... + 329528.
It is an arithmetic number, because the mean of its divisors is an integer number (4499040).
Almost surely, 2203128740 is an apocalyptic number.
203128740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 203128740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323930880).
203128740 is an abundant number, since it is smaller than the sum of its proper divisors (444733020).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
203128740 is a wasteful number, since it uses less digits than its factorization.
203128740 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 722 (or 717 counting only the distinct ones).
The product of its (nonzero) digits is 2688, while the sum is 27.
The square root of 203128740 is about 14252.3240210150. The cubic root of 203128740 is about 587.8372796995.
The spelling of 203128740 in words is "two hundred three million, one hundred twenty-eight thousand, seven hundred forty".
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