128159660 has 24 divisors (see below), whose sum is σ = 270330480. Its totient is φ = 51036224.

The previous prime is 128159659. The next prime is 128159699. The reversal of 128159660 is 66951821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9575 + ... + 18654.

It is an arithmetic number, because the mean of its divisors is an integer number (11263770).

Almost surely, 2^128159660 is an apocalyptic number.

128159660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128159660 is an abundant number, since it is smaller than the sum of its proper divisors (142170820).

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

128159660 is a wasteful number, since it uses less digits than its factorization.

128159660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28465 (or 28463 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 128159660 is about 11320.7623418213. The cubic root of 128159660 is about 504.1778735148.

The spelling of 128159660 in words is "one hundred twenty-eight million, one hundred fifty-nine thousand, six hundred sixty".