1989894896 has 40 divisors (see below), whose sum is σ = 4214181168. Its totient is φ = 902720000.

The previous prime is 1989894889. The next prime is 1989894901. The reversal of 1989894896 is 6984989891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80846 + ... + 102546.

Almost surely, 2^1989894896 is an apocalyptic number.

1989894896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1989894896 is an abundant number, since it is smaller than the sum of its proper divisors (2224286272).

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

1989894896 is a wasteful number, since it uses less digits than its factorization.

1989894896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22241 (or 22235 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 71.

The square root of 1989894896 is about 44608.2379835833. The cubic root of 1989894896 is about 1257.7955272206.

The spelling of 1989894896 in words is "one billion, nine hundred eighty-nine million, eight hundred ninety-four thousand, eight hundred ninety-six".