222390 has 48 divisors (see below), whose sum is σ = 662688. Its totient is φ = 50688.

The previous prime is 222389. The next prime is 222403. The reversal of 222390 is 93222.

222390 is nontrivially palindromic in base 8.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 6.

It is a zygodrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454 + ... + 806.

It is an arithmetic number, because the mean of its divisors is an integer number (13806).

2²²²³⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331344).

222390 is an abundant number, since it is smaller than the sum of its proper divisors (440298).

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

222390 is a wasteful number, since it uses less digits than its factorization.

222390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 222390 is about 471.5824424213. The cubic root of 222390 is about 60.5859262158.

The spelling of 222390 in words is "two hundred twenty-two thousand, three hundred ninety".