1819228 has 12 divisors (see below), whose sum is σ = 3293640. Its totient is φ = 878192.

The previous prime is 1819217. The next prime is 1819261. The reversal of 1819228 is 8229181.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1819228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7726 + ... + 7957.

It is an arithmetic number, because the mean of its divisors is an integer number (274470).

2^1819228 is an apocalyptic number.

It is an amenable number.

1819228 is a deficient number, since it is larger than the sum of its proper divisors (1474412).

1819228 is a wasteful number, since it uses less digits than its factorization.

1819228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15716 (or 15714 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 1819228 is about 1348.7876037390. The cubic root of 1819228 is about 122.0756495790.

It can be divided in two parts, 181 and 9228, that added together give a square (9409 = 97²).

The spelling of 1819228 in words is "one million, eight hundred nineteen thousand, two hundred twenty-eight".