1689352768 has 14 divisors (see below), whose sum is σ = 3352309526. Its totient is φ = 844676352.

The previous prime is 1689352751. The next prime is 1689352799. The reversal of 1689352768 is 8672539861.

It can be written as a sum of positive squares in only one way, i.e., 1654211584 + 35141184 = 40672^2 + 5928^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13198005 + ... + 13198132.

Almost surely, 2^1689352768 is an apocalyptic number.

It is an amenable number.

1689352768 is a deficient number, since it is larger than the sum of its proper divisors (1662956758).

1689352768 is an equidigital number, since it uses as much as digits as its factorization.

1689352768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26396149 (or 26396139 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The square root of 1689352768 is about 41101.7368002862. The cubic root of 1689352768 is about 1190.9863460359.

The spelling of 1689352768 in words is "one billion, six hundred eighty-nine million, three hundred fifty-two thousand, seven hundred sixty-eight".