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222690 = 23513571
BaseRepresentation
bin110110010111100010
3102022110210
4312113202
524111230
64434550
71615146
oct662742
9368423
10222690
11142346
12a8a56
137a490
145b226
1545eb0
hex365e2

222690 has 32 divisors (see below), whose sum is σ = 576576. Its totient is φ = 54720.

The previous prime is 222679. The next prime is 222707. The reversal of 222690 is 96222.

It is a happy number.

222690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2226902 = 99181672200, which contains 22 as substring.

It is an unprimeable number.

222690 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105 + ... + 675.

It is an arithmetic number, because the mean of its divisors is an integer number (18018).

2222690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288288).

222690 is an abundant number, since it is smaller than the sum of its proper divisors (353886).

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

222690 is a wasteful number, since it uses less digits than its factorization.

222690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 222690 is about 471.9004132230. The cubic root of 222690 is about 60.6131570731.

The spelling of 222690 in words is "two hundred twenty-two thousand, six hundred ninety".