128587085 has 16 divisors (see below), whose sum is σ = 171096192. Its totient is φ = 91982400.

The previous prime is 128587057. The next prime is 128587087. The reversal of 128587085 is 580785821.

It is not a de Polignac number, because 128587085 - 2⁶ = 128587021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128587087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15809 + ... + 22518.

It is an arithmetic number, because the mean of its divisors is an integer number (10693512).

Almost surely, 2^128587085 is an apocalyptic number.

It is an amenable number.

128587085 is a deficient number, since it is larger than the sum of its proper divisors (42509107).

128587085 is a wasteful number, since it uses less digits than its factorization.

128587085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38404.

The product of its (nonzero) digits is 179200, while the sum is 44.

The square root of 128587085 is about 11339.6245528677. The cubic root of 128587085 is about 504.7377457379.

The spelling of 128587085 in words is "one hundred twenty-eight million, five hundred eighty-seven thousand, eighty-five".