128366485 has 24 divisors (see below), whose sum is σ = 169166664. Its totient is φ = 93450240.

The previous prime is 128366461. The next prime is 128366503. The reversal of 128366485 is 584663821.

It can be written as a sum of positive squares in 12 ways, for example, as 76440049 + 51926436 = 8743^2 + 7206^2 .

It is not a de Polignac number, because 128366485 - 2⁵ = 128366453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60645 + ... + 62725.

It is an arithmetic number, because the mean of its divisors is an integer number (7048611).

Almost surely, 2^128366485 is an apocalyptic number.

It is an amenable number.

128366485 is a deficient number, since it is larger than the sum of its proper divisors (40800179).

128366485 is a wasteful number, since it uses less digits than its factorization.

128366485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185 (or 2172 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 128366485 is about 11329.8934240354. The cubic root of 128366485 is about 504.4489430667.

It can be divided in two parts, 12836 and 6485, that added together give a square (19321 = 139²).

The spelling of 128366485 in words is "one hundred twenty-eight million, three hundred sixty-six thousand, four hundred eighty-five".