159727720 has 16 divisors (see below), whose sum is σ = 359387460. Its totient is φ = 63891072.

The previous prime is 159727703. The next prime is 159727739. The reversal of 159727720 is 27727951.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 147039876 + 12687844 = 12126^2 + 3562^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 3993193 = 159727720 / (1 + 5 + 9 + 7 + 2 + 7 + 7 + 2 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996557 + ... + 1996636.

Almost surely, 2^159727720 is an apocalyptic number.

159727720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

159727720 is an abundant number, since it is smaller than the sum of its proper divisors (199659740).

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

159727720 is a wasteful number, since it uses less digits than its factorization.

159727720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993204 (or 3993200 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 159727720 is about 12638.3432458531. The cubic root of 159727720 is about 542.5753977900.

The spelling of 159727720 in words is "one hundred fifty-nine million, seven hundred twenty-seven thousand, seven hundred twenty".