1900228 has 24 divisors (see below), whose sum is σ = 3820320. Its totient is φ = 817920.

The previous prime is 1900219. The next prime is 1900231. The reversal of 1900228 is 8220091.

It is a super-2 number, since 2×1900228² = 7221732903968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1900199 and 1900208.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 301 + ... + 1972.

It is an arithmetic number, because the mean of its divisors is an integer number (159180).

2^1900228 is an apocalyptic number.

It is an amenable number.

1900228 is an abundant number, since it is smaller than the sum of its proper divisors (1920092).

1900228 is a wasteful number, since it uses less digits than its factorization.

1900228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2307 (or 2305 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1900228 is about 1378.4875770206. The cubic root of 1900228 is about 123.8611870142.

The spelling of 1900228 in words is "one million, nine hundred thousand, two hundred twenty-eight".