| Base | Representation |
|---|---|
| bin | 11010100001000… |
| … | …11110001100000 |
| 3 | 120111120100200101 |
| 4 | 31100203301200 |
| 5 | 423421212030 |
| 6 | 34023432144 |
| 7 | 5340514435 |
| oct | 1520436140 |
| 9 | 514510611 |
| 10 | 222444640 |
| 11 | 104622a50 |
| 12 | 625b5654 |
| 13 | 37115362 |
| 14 | 21785b8c |
| 15 | 147de7ca |
| hex | d423c60 |
222444640 has 96 divisors (see below), whose sum is σ = 576979200. Its totient is φ = 80371200.
The previous prime is 222444637. The next prime is 222444641. The reversal of 222444640 is 46444222.
It is a junction number, because it is equal to n+sod(n) for n = 222444599 and 222444608.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (222444641) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371061 + ... + 371659.
It is an arithmetic number, because the mean of its divisors is an integer number (6010200).
Almost surely, 2222444640 is an apocalyptic number.
222444640 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 222444640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288489600).
222444640 is an abundant number, since it is smaller than the sum of its proper divisors (354534560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
222444640 is a wasteful number, since it uses less digits than its factorization.
222444640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 836 (or 828 counting only the distinct ones).
The product of its (nonzero) digits is 12288, while the sum is 28.
The square root of 222444640 is about 14914.5781033189. The cubic root of 222444640 is about 605.9088768577.
Adding to 222444640 its reverse (46444222), we get a palindrome (268888862).
It can be divided in two parts, 2224 and 44640, that added together give a palindrome (46864).
The spelling of 222444640 in words is "two hundred twenty-two million, four hundred forty-four thousand, six hundred forty".
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