159709140 has 72 divisors (see below), whose sum is σ = 493621128. Its totient is φ = 41783040.

The previous prime is 159709133. The next prime is 159709141. The reversal of 159709140 is 41907951.

It can be written as a sum of positive squares in 4 ways, for example, as 74442384 + 85266756 = 8628^2 + 9234^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 159709095 and 159709104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159709141) 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, 1170 + ... + 17910.

It is an arithmetic number, because the mean of its divisors is an integer number (6855849).

Almost surely, 2^159709140 is an apocalyptic number.

159709140 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 159709140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246810564).

159709140 is an abundant number, since it is smaller than the sum of its proper divisors (333911988).

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

159709140 is a wasteful number, since it uses less digits than its factorization.

159709140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16809 (or 16804 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 159709140 is about 12637.6081597745. The cubic root of 159709140 is about 542.5543589835.

The spelling of 159709140 in words is "one hundred fifty-nine million, seven hundred nine thousand, one hundred forty".