690222 has 16 divisors (see below), whose sum is σ = 1486800. Its totient is φ = 212352.

The previous prime is 690187. The next prime is 690233. The reversal of 690222 is 222096.

It is a happy number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690222.

It is an unprimeable number.

690222 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 7 ways as a sum of consecutive naturals, for example, 4347 + ... + 4502.

It is an arithmetic number, because the mean of its divisors is an integer number (92925).

2⁶⁹⁰²²² is an apocalyptic number.

690222 is an abundant number, since it is smaller than the sum of its proper divisors (796578).

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

690222 is a wasteful number, since it uses less digits than its factorization.

690222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8867.

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

The square root of 690222 is about 830.7960038421. The cubic root of 690222 is about 88.3750350939.

The spelling of 690222 in words is "six hundred ninety thousand, two hundred twenty-two".