1989663584 has 24 divisors (see below), whose sum is σ = 4123317240. Its totient is φ = 942471936.

The previous prime is 1989663583. The next prime is 1989663631. The reversal of 1989663584 is 4853669891.

It is a super-2 number, since 2×1989663584² = 7917522354991450112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989663583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635629 + ... + 1636844.

It is an arithmetic number, because the mean of its divisors is an integer number (171804885).

Almost surely, 2^1989663584 is an apocalyptic number.

It is an amenable number.

1989663584 is an abundant number, since it is smaller than the sum of its proper divisors (2133653656).

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

1989663584 is a wasteful number, since it uses less digits than its factorization.

1989663584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272502 (or 3272494 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 59.

The square root of 1989663584 is about 44605.6452032700. The cubic root of 1989663584 is about 1257.7467885537.

The spelling of 1989663584 in words is "one billion, nine hundred eighty-nine million, six hundred sixty-three thousand, five hundred eighty-four".