128585580 has 24 divisors (see below), whose sum is σ = 360039792. Its totient is φ = 34289472.

The previous prime is 128585557. The next prime is 128585599. The reversal of 128585580 is 85585821.

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, 1071487 + ... + 1071606.

It is an arithmetic number, because the mean of its divisors is an integer number (15001658).

Almost surely, 2^128585580 is an apocalyptic number.

128585580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128585580 is an abundant number, since it is smaller than the sum of its proper divisors (231454212).

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

128585580 is a wasteful number, since it uses less digits than its factorization.

128585580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143105 (or 2143103 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 42.

The square root of 128585580 is about 11339.5581924518. The cubic root of 128585580 is about 504.7357765581.

The spelling of 128585580 in words is "one hundred twenty-eight million, five hundred eighty-five thousand, five hundred eighty".