1813228 has 12 divisors (see below), whose sum is σ = 3311280. Its totient is φ = 867152.

The previous prime is 1813223. The next prime is 1813277. The reversal of 1813228 is 8223181.

It is not an unprimeable number, because it can be changed into a prime (1813223) 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, 9763 + ... + 9946.

It is an arithmetic number, because the mean of its divisors is an integer number (275940).

2^1813228 is an apocalyptic number.

It is an amenable number.

1813228 is a deficient number, since it is larger than the sum of its proper divisors (1498052).

1813228 is a wasteful number, since it uses less digits than its factorization.

1813228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19736 (or 19734 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 1813228 is about 1346.5615470523. The cubic root of 1813228 is about 121.9412957739.

The spelling of 1813228 in words is "one million, eight hundred thirteen thousand, two hundred twenty-eight".