Base | Representation |
---|---|
bin | 1000100101011… |
… | …01111011001000 |
3 | 12000111202202222 |
4 | 10102231323020 |
5 | 121413444220 |
6 | 11051313212 |
7 | 1533056621 |
oct | 422557310 |
9 | 160452688 |
10 | 72015560 |
11 | 377183a1 |
12 | 2014b808 |
13 | 11bc6076 |
14 | 97c8a48 |
15 | 64c7e25 |
hex | 44adec8 |
72015560 has 16 divisors (see below), whose sum is σ = 162035100. Its totient is φ = 28806208.
The previous prime is 72015539. The next prime is 72015569. The reversal of 72015560 is 6551027.
It can be written as a sum of positive squares in 2 ways, for example, as 72012196 + 3364 = 8486^2 + 58^2 .
It is a super-2 number, since 2×720155602 = 10372481764227200, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (72015569) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 900155 + ... + 900234.
Almost surely, 272015560 is an apocalyptic number.
It is an amenable number.
72015560 is an abundant number, since it is smaller than the sum of its proper divisors (90019540).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
72015560 is a wasteful number, since it uses less digits than its factorization.
72015560 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1800400 (or 1800396 counting only the distinct ones).
The product of its (nonzero) digits is 2100, while the sum is 26.
The square root of 72015560 is about 8486.1982064998. The cubic root of 72015560 is about 416.0467310669.
Adding to 72015560 its reverse (6551027), we get a palindrome (78566587).
The spelling of 72015560 in words is "seventy-two million, fifteen thousand, five hundred sixty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.000 sec. • engine limits •