128379585 has 24 divisors (see below), whose sum is σ = 207708480. Its totient is φ = 67710400.

The previous prime is 128379577. The next prime is 128379593. The reversal of 128379585 is 585973821.

It is an interprime number because it is at equal distance from previous prime (128379577) and next prime (128379593).

It is not a de Polignac number, because 128379585 - 2³ = 128379577 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152596 + ... + 153434.

It is an arithmetic number, because the mean of its divisors is an integer number (8654520).

Almost surely, 2^128379585 is an apocalyptic number.

128379585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128379585 is a deficient number, since it is larger than the sum of its proper divisors (79328895).

128379585 is an equidigital number, since it uses as much as digits as its factorization.

128379585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 948 counting only the distinct ones).

The product of its digits is 604800, while the sum is 48.

The square root of 128379585 is about 11330.4715259339. The cubic root of 128379585 is about 504.4661024168.

It can be divided in two parts, 12837 and 9585, that added together give a palindrome (22422).

The spelling of 128379585 in words is "one hundred twenty-eight million, three hundred seventy-nine thousand, five hundred eighty-five".