159239988 has 54 divisors (see below), whose sum is σ = 424858434. Its totient is φ = 50282208.

The previous prime is 159239981. The next prime is 159239989. The reversal of 159239988 is 889932951.

It can be written as a sum of positive squares in only one way, i.e., 135210384 + 24029604 = 11628^2 + 4902^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159239981) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 6870 + ... + 19122.

Almost surely, 2^159239988 is an apocalyptic number.

159239988 is a gapful number since it is divisible by the number (18) 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 159239988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212429217).

159239988 is an abundant number, since it is smaller than the sum of its proper divisors (265618446).

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

159239988 is a wasteful number, since it uses less digits than its factorization.

159239988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12301 (or 12277 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The square root of 159239988 is about 12619.0327680056. The cubic root of 159239988 is about 542.0225795434.

The spelling of 159239988 in words is "one hundred fifty-nine million, two hundred thirty-nine thousand, nine hundred eighty-eight".