1890222 has 8 divisors (see below), whose sum is σ = 3780456. Its totient is φ = 630072.

The previous prime is 1890221. The next prime is 1890227. The reversal of 1890222 is 2220981.

It is a sphenic number, since it is the product of 3 distinct primes.

1890222 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1890192 and 1890201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1890221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157513 + ... + 157524.

It is an arithmetic number, because the mean of its divisors is an integer number (472557).

2^1890222 is an apocalyptic number.

1890222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1890222 is a wasteful number, since it uses less digits than its factorization.

1890222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315042.

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

The square root of 1890222 is about 1374.8534467353. The cubic root of 1890222 is about 123.6433996795.

It can be divided in two parts, 1890 and 222, that added together give a palindrome (2112).

The spelling of 1890222 in words is "one million, eight hundred ninety thousand, two hundred twenty-two".