1818228 has 24 divisors (see below), whose sum is σ = 4265632. Its totient is φ = 602784.

The previous prime is 1818221. The next prime is 1818233. The reversal of 1818228 is 8228181.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1818195 and 1818204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3051 + ... + 3597.

2^1818228 is an apocalyptic number.

It is an amenable number.

1818228 is an abundant number, since it is smaller than the sum of its proper divisors (2447404).

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

1818228 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (1818227) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (829).

1818228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 829 counting only the distinct ones).

The product of its digits is 2048, while the sum is 30.

The square root of 1818228 is about 1348.4168494943. The cubic root of 1818228 is about 122.0532778139.

The spelling of 1818228 in words is "one million, eight hundred eighteen thousand, two hundred twenty-eight".