Base | Representation |
---|---|
bin | 1010001100010… |
… | …1011011101000 |
3 | 2222110000100001 |
4 | 2203011123220 |
5 | 41421023340 |
6 | 4124152344 |
7 | 1026245404 |
oct | 243053350 |
9 | 88400301 |
10 | 42751720 |
11 | 22150000 |
12 | 123986b4 |
13 | 8b1b19b |
14 | 596c104 |
15 | 3b4729a |
hex | 28c56e8 |
42751720 has 80 divisors (see below), whose sum is σ = 107259300. Its totient is φ = 15333120.
The previous prime is 42751703. The next prime is 42751763. The reversal of 42751720 is 2715724.
It can be written as a sum of positive squares in 2 ways, for example, as 42693156 + 58564 = 6534^2 + 242^2 .
It is an unprimeable number.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 585604 + ... + 585676.
Almost surely, 242751720 is an apocalyptic number.
42751720 is a gapful number since it is divisible by the number (40) 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 42751720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53629650).
42751720 is an abundant number, since it is smaller than the sum of its proper divisors (64507580).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
42751720 is an equidigital number, since it uses as much as digits as its factorization.
42751720 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 128 (or 91 counting only the distinct ones).
The product of its (nonzero) digits is 3920, while the sum is 28.
The square root of 42751720 is about 6538.4799456754. The cubic root of 42751720 is about 349.6642221872.
It can be divided in two parts, 4275 and 1720, that added together give a palindrome (5995).
The spelling of 42751720 in words is "forty-two million, seven hundred fifty-one thousand, seven hundred twenty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.068 sec. • engine limits •