159747840 has 324 divisors, whose sum is σ = 645221304. Its totient is φ = 36384768.

The previous prime is 159747823. The next prime is 159747853. The reversal of 159747840 is 48747951.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 564339 + ... + 564621.

Almost surely, 2^159747840 is an apocalyptic number.

159747840 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 159747840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322610652).

159747840 is an abundant number, since it is smaller than the sum of its proper divisors (485473464).

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

159747840 is a wasteful number, since it uses less digits than its factorization.

159747840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 159747840 is about 12639.1392111963. The cubic root of 159747840 is about 542.5981785544.

The spelling of 159747840 in words is "one hundred fifty-nine million, seven hundred forty-seven thousand, eight hundred forty".