[go: up one dir, main page]

Search a number
-
+
18222708 = 22372171823
BaseRepresentation
bin100010110000…
…0111001110100
31021021210212010
41011200321310
514131111313
61450324220
7310614300
oct105407164
937253763
1018222708
11a316a99
126129670
133a1048a
1425c4d00
1518ee4c3
hex1160e74

18222708 has 72 divisors (see below), whose sum is σ = 52399872. Its totient is φ = 4897536.

The previous prime is 18222707. The next prime is 18222731. The reversal of 18222708 is 80722281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222703) 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 23 ways as a sum of consecutive naturals, for example, 9085 + ... + 10907.

It is an arithmetic number, because the mean of its divisors is an integer number (727776).

Almost surely, 218222708 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 18222708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26199936).

18222708 is an abundant number, since it is smaller than the sum of its proper divisors (34177164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18222708 is a wasteful number, since it uses less digits than its factorization.

18222708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1852 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 18222708 is about 4268.8063905499. The cubic root of 18222708 is about 263.1505641270.

Adding to 18222708 its reverse (80722281), we get a palindrome (98944989).

The spelling of 18222708 in words is "eighteen million, two hundred twenty-two thousand, seven hundred eight".

Divisors: 1 2 3 4 6 7 12 14 17 21 28 34 42 49 51 68 84 98 102 119 147 196 204 238 294 357 476 588 714 833 1428 1666 1823 2499 3332 3646 4998 5469 7292 9996 10938 12761 21876 25522 30991 38283 51044 61982 76566 89327 92973 123964 153132 178654 185946 216937 267981 357308 371892 433874 535962 650811 867748 1071924 1301622 1518559 2603244 3037118 4555677 6074236 9111354 18222708