1809222 has 32 divisors (see below), whose sum is σ = 3815424. Its totient is φ = 571200.

The previous prime is 1809221. The next prime is 1809229. The reversal of 1809222 is 2229081.

It is a junction number, because it is equal to n+sod(n) for n = 1809192 and 1809201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1809221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13138 + ... + 13274.

It is an arithmetic number, because the mean of its divisors is an integer number (119232).

2^1809222 is an apocalyptic number.

1809222 is an abundant number, since it is smaller than the sum of its proper divisors (2006202).

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

1809222 is a wasteful number, since it uses less digits than its factorization.

1809222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1809222 is about 1345.0732322071. The cubic root of 1809222 is about 121.8514271305.

The spelling of 1809222 in words is "one million, eight hundred nine thousand, two hundred twenty-two".