159990000 has 100 divisors (see below), whose sum is σ = 516565896. Its totient is φ = 42656000.

The previous prime is 159989993. The next prime is 159990011. The reversal of 159990000 is 99951.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27334 + ... + 32666.

Almost surely, 2^159990000 is an apocalyptic number.

159990000 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 159990000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258282948).

159990000 is an abundant number, since it is smaller than the sum of its proper divisors (356575896).

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

159990000 is an equidigital number, since it uses as much as digits as its factorization.

159990000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5364 (or 5343 counting only the distinct ones).

The product of its (nonzero) digits is 3645, while the sum is 33.

The square root of 159990000 is about 12648.7153497895. The cubic root of 159990000 is about 542.8722130099.

The spelling of 159990000 in words is "one hundred fifty-nine million, nine hundred ninety thousand".