1890228 has 12 divisors (see below), whose sum is σ = 4410560. Its totient is φ = 630072.

The previous prime is 1890227. The next prime is 1890241. The reversal of 1890228 is 8220981.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1890195 and 1890204.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78748 + ... + 78771.

2^1890228 is an apocalyptic number.

It is an amenable number.

1890228 is an abundant number, since it is smaller than the sum of its proper divisors (2520332).

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

1890228 is a wasteful number, since it uses less digits than its factorization.

1890228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157526 (or 157524 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1890228 is about 1374.8556287843. The cubic root of 1890228 is about 123.6435305036.

The spelling of 1890228 in words is "one million, eight hundred ninety thousand, two hundred twenty-eight".