159785280 has 168 divisors, whose sum is σ = 555726600. Its totient is φ = 42135552.

The previous prime is 159785243. The next prime is 159785281. The reversal of 159785280 is 82587951.

It is a happy number.

159785280 is a `hidden beast` number, since 1 + 59 + 78 + 528 + 0 = 666.

159785280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 49787136 + 109998144 = 7056^2 + 10488^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159785281) 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, 313666 + ... + 314174.

Almost surely, 2^159785280 is an apocalyptic number.

159785280 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 159785280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277863300).

159785280 is an abundant number, since it is smaller than the sum of its proper divisors (395941320).

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

159785280 is a wasteful number, since it uses less digits than its factorization.

159785280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 159785280 is about 12640.6202379472. The cubic root of 159785280 is about 542.6405647070.

The spelling of 159785280 in words is "one hundred fifty-nine million, seven hundred eighty-five thousand, two hundred eighty".