1816228 has 24 divisors (see below), whose sum is σ = 3336704. Its totient is φ = 864000.

The previous prime is 1816211. The next prime is 1816237. The reversal of 1816228 is 8226181.

It is a junction number, because it is equal to n+sod(n) for n = 1816196 and 1816205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11953 + ... + 12103.

2^1816228 is an apocalyptic number.

It is an amenable number.

1816228 is a deficient number, since it is larger than the sum of its proper divisors (1520476).

1816228 is a wasteful number, since it uses less digits than its factorization.

1816228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 281 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 1816228 is about 1347.6750350140. The cubic root of 1816228 is about 122.0085096635.

It can be divided in two parts, 18162 and 28, that multiplied together give a triangular number (508536 = T₁₀₀₈).

The spelling of 1816228 in words is "one million, eight hundred sixteen thousand, two hundred twenty-eight".