1989228 has 24 divisors (see below), whose sum is σ = 4741632. Its totient is φ = 648784.

The previous prime is 1989217. The next prime is 1989233. The reversal of 1989228 is 8229891.

It is an Ulam number.

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, 1200 + ... + 2327.

It is an arithmetic number, because the mean of its divisors is an integer number (197568).

2^1989228 is an apocalyptic number.

It is an amenable number.

1989228 is an abundant number, since it is smaller than the sum of its proper divisors (2752404).

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

1989228 is a wasteful number, since it uses less digits than its factorization.

1989228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581 (or 3579 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 1989228 is about 1410.3999432785. The cubic root of 1989228 is about 125.7654998436.

The spelling of 1989228 in words is "one million, nine hundred eighty-nine thousand, two hundred twenty-eight".