159640740 has 192 divisors, whose sum is σ = 573350400. Its totient is φ = 36122112.

The previous prime is 159640711. The next prime is 159640753. The reversal of 159640740 is 47046951.

159640740 is a `hidden beast` number, since 1 + 5 + 9 + 640 + 7 + 4 + 0 = 666.

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 = 159640695 and 159640704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 593326 + ... + 593594.

It is an arithmetic number, because the mean of its divisors is an integer number (2986200).

Almost surely, 2^159640740 is an apocalyptic number.

159640740 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 159640740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286675200).

159640740 is an abundant number, since it is smaller than the sum of its proper divisors (413709660).

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

159640740 is a wasteful number, since it uses less digits than its factorization.

159640740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 159640740 is about 12634.9016616672. The cubic root of 159640740 is about 542.4768931241.

The spelling of 159640740 in words is "one hundred fifty-nine million, six hundred forty thousand, seven hundred forty".