1689869824 has 60 divisors (see below), whose sum is σ = 3436567992. Its totient is φ = 830146560.

The previous prime is 1689869813. The next prime is 1689869849. The reversal of 1689869824 is 4289689861.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

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 in 5 ways as a sum of consecutive naturals, for example, 1904709 + ... + 1905595.

Almost surely, 2^1689869824 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 1689869824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718283996).

1689869824 is an abundant number, since it is smaller than the sum of its proper divisors (1746698168).

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

1689869824 is an frugal number, since it uses more digits than its factorization.

1689869824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 950 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 61.

The square root of 1689869824 is about 41108.0262722500. The cubic root of 1689869824 is about 1191.1078410511.

The spelling of 1689869824 in words is "one billion, six hundred eighty-nine million, eight hundred sixty-nine thousand, eight hundred twenty-four".