128159530 has 24 divisors (see below), whose sum is σ = 234406692. Its totient is φ = 50440896.

The previous prime is 128159509. The next prime is 128159531. The reversal of 128159530 is 35951821.

It can be written as a sum of positive squares in 2 ways, for example, as 127983969 + 175561 = 11313^2 + 419^2 .

It is not an unprimeable number, because it can be changed into a prime (128159531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305661 + ... + 306079.

Almost surely, 2^128159530 is an apocalyptic number.

128159530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128159530 is a deficient number, since it is larger than the sum of its proper divisors (106247162).

128159530 is an frugal number, since it uses more digits than its factorization.

128159530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 128159530 is about 11320.7566001571. The cubic root of 128159530 is about 504.1777030422.

The spelling of 128159530 in words is "one hundred twenty-eight million, one hundred fifty-nine thousand, five hundred thirty".