128580280 has 32 divisors (see below), whose sum is σ = 292798800. Its totient is φ = 50811136.

The previous prime is 128580269. The next prime is 128580289. The reversal of 128580280 is 82085821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128580289) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16045 + ... + 22684.

Almost surely, 2^128580280 is an apocalyptic number.

128580280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128580280 is an abundant number, since it is smaller than the sum of its proper divisors (164218520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128580280 is a wasteful number, since it uses less digits than its factorization.

128580280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38823 (or 38819 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 128580280 is about 11339.3244948718. The cubic root of 128580280 is about 504.7288417827.

The spelling of 128580280 in words is "one hundred twenty-eight million, five hundred eighty thousand, two hundred eighty".