Base | Representation |
---|---|
bin | 11000011111100… |
… | …11110000000000 |
3 | 112022121222211200 |
4 | 30033303300000 |
5 | 410100030340 |
6 | 32215541200 |
7 | 5043321000 |
oct | 1417636000 |
9 | 468558750 |
10 | 205470720 |
11 | a5a8a214 |
12 | 5898a800 |
13 | 33751410 |
14 | 1d408000 |
15 | 1308a330 |
hex | c3f3c00 |
205470720 has 528 divisors, whose sum is σ = 894129600. Its totient is φ = 43352064.
The previous prime is 205470689. The next prime is 205470737. The reversal of 205470720 is 27074502.
It is a zygodrome in base 2.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15805434 + ... + 15805446.
Almost surely, 2205470720 is an apocalyptic number.
205470720 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 205470720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (447064800).
205470720 is an abundant number, since it is smaller than the sum of its proper divisors (688658880).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
205470720 is a wasteful number, since it uses less digits than its factorization.
205470720 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 65 (or 30 counting only the distinct ones).
The product of its (nonzero) digits is 3920, while the sum is 27.
The square root of 205470720 is about 14334.2498931754. The cubic root of 205470720 is about 590.0878160966.
The spelling of 205470720 in words is "two hundred five million, four hundred seventy thousand, seven hundred twenty".
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