1989605160 has 128 divisors (see below), whose sum is σ = 6757344000. Its totient is φ = 520535808.

The previous prime is 1989605153. The next prime is 1989605207. The reversal of 1989605160 is 615069891.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39861 + ... + 74619.

It is an arithmetic number, because the mean of its divisors is an integer number (52791750).

Almost surely, 2^1989605160 is an apocalyptic number.

1989605160 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 1989605160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3378672000).

1989605160 is an abundant number, since it is smaller than the sum of its proper divisors (4767738840).

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

1989605160 is a wasteful number, since it uses less digits than its factorization.

1989605160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34832 (or 34822 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1989605160 is about 44604.9903037765. The cubic root of 1989605160 is about 1257.7344777091.

The spelling of 1989605160 in words is "one billion, nine hundred eighty-nine million, six hundred five thousand, one hundred sixty".