128091560 has 32 divisors (see below), whose sum is σ = 289496160. Its totient is φ = 51007296.

The previous prime is 128091547. The next prime is 128091581. The reversal of 128091560 is 65190821.

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, 2027 + ... + 16133.

It is an arithmetic number, because the mean of its divisors is an integer number (9046755).

Almost surely, 2^128091560 is an apocalyptic number.

128091560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128091560 is an abundant number, since it is smaller than the sum of its proper divisors (161404600).

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

128091560 is a wasteful number, since it uses less digits than its factorization.

128091560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14345 (or 14341 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 128091560 is about 11317.7541941853. The cubic root of 128091560 is about 504.0885562876.

The spelling of 128091560 in words is "one hundred twenty-eight million, ninety-one thousand, five hundred sixty".