222990 has 16 divisors (see below), whose sum is σ = 535248. Its totient is φ = 59456.

The previous prime is 222979. The next prime is 222991. The reversal of 222990 is 99222.

It is a self number, because there is not a number n which added to its sum of digits gives 222990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3687 + ... + 3746.

It is an arithmetic number, because the mean of its divisors is an integer number (33453).

2²²²⁹⁹⁰ is an apocalyptic number.

222990 is an abundant number, since it is smaller than the sum of its proper divisors (312258).

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

222990 is a wasteful number, since it uses less digits than its factorization.

222990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7443.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 222990 is about 472.2181699173. The cubic root of 222990 is about 60.6403634850.

The spelling of 222990 in words is "two hundred twenty-two thousand, nine hundred ninety".