1689228 has 24 divisors (see below), whose sum is σ = 4379760. Its totient is φ = 563040.

The previous prime is 1689217. The next prime is 1689253. The reversal of 1689228 is 8229861.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1689192 and 1689201.

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, 7713 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (182490).

2^1689228 is an apocalyptic number.

1689228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1689228 is an abundant number, since it is smaller than the sum of its proper divisors (2690532).

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

1689228 is a wasteful number, since it uses less digits than its factorization.

1689228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15654 (or 15646 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 1689228 is about 1299.7030430064. The cubic root of 1689228 is about 119.0957025015.

The spelling of 1689228 in words is "one million, six hundred eighty-nine thousand, two hundred twenty-eight".