128316585 has 16 divisors (see below), whose sum is σ = 207126144. Its totient is φ = 67828992.

The previous prime is 128316583. The next prime is 128316623. The reversal of 128316585 is 585613821.

It is not a de Polignac number, because 128316585 - 2¹ = 128316583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128316581) 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, 36157 + ... + 39546.

It is an arithmetic number, because the mean of its divisors is an integer number (12945384).

Almost surely, 2^128316585 is an apocalyptic number.

128316585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128316585 is a deficient number, since it is larger than the sum of its proper divisors (78809559).

128316585 is a wasteful number, since it uses less digits than its factorization.

128316585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75824.

The product of its digits is 57600, while the sum is 39.

The square root of 128316585 is about 11327.6910709994. The cubic root of 128316585 is about 504.3835696564.

The spelling of 128316585 in words is "one hundred twenty-eight million, three hundred sixteen thousand, five hundred eighty-five".