Base | Representation |
---|---|
bin | 1111011011010… |
… | …1010110101000 |
3 | 11111202101220001 |
4 | 3312311112220 |
5 | 113031042320 |
6 | 10230512344 |
7 | 1413664054 |
oct | 366652650 |
9 | 144671801 |
10 | 64705960 |
11 | 33585600 |
12 | 198056b4 |
13 | 10536c67 |
14 | 8844c64 |
15 | 5a3220a |
hex | 3db55a8 |
64705960 has 96 divisors (see below), whose sum is σ = 165904200. Its totient is φ = 22668800.
The previous prime is 64705957. The next prime is 64705999. The reversal of 64705960 is 6950746.
It can be written as a sum of positive squares in 4 ways, for example, as 47416996 + 17288964 = 6886^2 + 4158^2 .
It is a super-2 number, since 2×647059602 = 8373722519043200, which contains 22 as substring.
It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140130 + ... + 140590.
Almost surely, 264705960 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 64705960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82952100).
64705960 is an abundant number, since it is smaller than the sum of its proper divisors (101198240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
64705960 is a wasteful number, since it uses less digits than its factorization.
64705960 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 523 (or 508 counting only the distinct ones).
The product of its (nonzero) digits is 45360, while the sum is 37.
The square root of 64705960 is about 8044.0014917950. The cubic root of 64705960 is about 401.4653751338.
The spelling of 64705960 in words is "sixty-four million, seven hundred five thousand, nine hundred sixty".
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