159989840 has 40 divisors (see below), whose sum is σ = 388153728. Its totient is φ = 61212800.

The previous prime is 159989821. The next prime is 159989857. The reversal of 159989840 is 48989951.

159989840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41636 + ... + 45315.

Almost surely, 2^159989840 is an apocalyptic number.

159989840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

159989840 is an abundant number, since it is smaller than the sum of its proper divisors (228163888).

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

159989840 is a wasteful number, since it uses less digits than its factorization.

159989840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86987 (or 86981 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 159989840 is about 12648.7090250349. The cubic root of 159989840 is about 542.8720320412.

The spelling of 159989840 in words is "one hundred fifty-nine million, nine hundred eighty-nine thousand, eight hundred forty".