1689311328 has 48 divisors (see below), whose sum is σ = 4469391360. Its totient is φ = 558665856.

The previous prime is 1689311311. The next prime is 1689311353. The reversal of 1689311328 is 8231139861.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1689311328.

It is a congruent 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, 57088 + ... + 81471.

It is an arithmetic number, because the mean of its divisors is an integer number (93112320).

Almost surely, 2^1689311328 is an apocalyptic number.

It is an amenable number.

1689311328 is an abundant number, since it is smaller than the sum of its proper divisors (2780080032).

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

1689311328 is a wasteful number, since it uses less digits than its factorization.

1689311328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138699 (or 138691 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 1689311328 is about 41101.2326822445. The cubic root of 1689311328 is about 1190.9766076164.

The spelling of 1689311328 in words is "one billion, six hundred eighty-nine million, three hundred eleven thousand, three hundred twenty-eight".