128280485 has 8 divisors (see below), whose sum is σ = 159244920. Its totient is φ = 99085504.

The previous prime is 128280479. The next prime is 128280497. The reversal of 128280485 is 584082821.

It can be written as a sum of positive squares in 4 ways, for example, as 45670564 + 82609921 = 6758^2 + 9089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128280485 - 2⁶ = 128280421 is a prime.

It is a congruent number.

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, 442202 + ... + 442491.

It is an arithmetic number, because the mean of its divisors is an integer number (19905615).

Almost surely, 2^128280485 is an apocalyptic number.

It is an amenable number.

128280485 is a deficient number, since it is larger than the sum of its proper divisors (30964435).

128280485 is an equidigital number, since it uses as much as digits as its factorization.

128280485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884727.

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 128280485 is about 11326.0975185630. The cubic root of 128280485 is about 504.3362648993.

The spelling of 128280485 in words is "one hundred twenty-eight million, two hundred eighty thousand, four hundred eighty-five".