159987438 has 48 divisors (see below), whose sum is σ = 374403120. Its totient is φ = 49082112.

The previous prime is 159987413. The next prime is 159987439. The reversal of 159987438 is 834789951.

159987438 is a `hidden beast` number, since 1 + 599 + 8 + 7 + 43 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159987439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100533 + ... + 102111.

It is an arithmetic number, because the mean of its divisors is an integer number (7800065).

Almost surely, 2^159987438 is an apocalyptic number.

159987438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 159987438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187201560).

159987438 is an abundant number, since it is smaller than the sum of its proper divisors (214415682).

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

159987438 is a wasteful number, since it uses less digits than its factorization.

159987438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033 (or 2030 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 159987438 is about 12648.6140742771. The cubic root of 159987438 is about 542.8693152329.

It can be divided in two parts, 15998 and 7438, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 159987438 in words is "one hundred fifty-nine million, nine hundred eighty-seven thousand, four hundred thirty-eight".