1689648 has 20 divisors (see below), whose sum is σ = 4365048. Its totient is φ = 563200.

The previous prime is 1689641. The next prime is 1689659. The reversal of 1689648 is 8469861.

It is not an unprimeable number, because it can be changed into a prime (1689641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17553 + ... + 17648.

2^1689648 is an apocalyptic number.

It is an amenable number.

1689648 is an abundant number, since it is smaller than the sum of its proper divisors (2675400).

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

1689648 is a wasteful number, since it uses less digits than its factorization.

1689648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35212 (or 35206 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1689648 is about 1299.8646083343. The cubic root of 1689648 is about 119.1055721086.

The spelling of 1689648 in words is "one million, six hundred eighty-nine thousand, six hundred forty-eight".