1989436160 has 144 divisors (see below), whose sum is σ = 4964074752. Its totient is φ = 763084800.

The previous prime is 1989436133. The next prime is 1989436177. The reversal of 1989436160 is 616349891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7181942 + ... + 7182218.

Almost surely, 2^1989436160 is an apocalyptic number.

1989436160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989436160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482037376).

1989436160 is an abundant number, since it is smaller than the sum of its proper divisors (2974638592).

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

1989436160 is a wasteful number, since it uses less digits than its factorization.

1989436160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 1989436160 is about 44603.0958566779. The cubic root of 1989436160 is about 1257.6988654263.

The spelling of 1989436160 in words is "one billion, nine hundred eighty-nine million, four hundred thirty-six thousand, one hundred sixty".