1689564384 has 72 divisors (see below), whose sum is σ = 4833606960. Its totient is φ = 559799808.

The previous prime is 1689564323. The next prime is 1689564391. The reversal of 1689564384 is 4834659861.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 1689564384.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30532 + ... + 65660.

It is an arithmetic number, because the mean of its divisors is an integer number (67133430).

Almost surely, 2^1689564384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1689564384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2416803480).

1689564384 is an abundant number, since it is smaller than the sum of its proper divisors (3144042576).

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

1689564384 is a wasteful number, since it uses less digits than its factorization.

1689564384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35312 (or 35301 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 1689564384 is about 41104.3110147829. The cubic root of 1689564384 is about 1191.0360734124.

The spelling of 1689564384 in words is "one billion, six hundred eighty-nine million, five hundred sixty-four thousand, three hundred eighty-four".