1689384628 has 24 divisors (see below), whose sum is σ = 3038976584. Its totient is φ = 821145600.

The previous prime is 1689384553. The next prime is 1689384643. The reversal of 1689384628 is 8264839861.

It can be written as a sum of positive squares in 4 ways, for example, as 485849764 + 1203534864 = 22042^2 + 34692^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191188 + ... + 199828.

Almost surely, 2^1689384628 is an apocalyptic number.

It is an amenable number.

1689384628 is a deficient number, since it is larger than the sum of its proper divisors (1349591956).

1689384628 is a wasteful number, since it uses less digits than its factorization.

1689384628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10003 (or 10001 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 55.

The square root of 1689384628 is about 41102.1243733216. The cubic root of 1689384628 is about 1190.9938330426.

The spelling of 1689384628 in words is "one billion, six hundred eighty-nine million, three hundred eighty-four thousand, six hundred twenty-eight".