128860280 has 32 divisors (see below), whose sum is σ = 305197200. Its totient is φ = 48830976.

The previous prime is 128860267. The next prime is 128860301. The reversal of 128860280 is 82068821.

It is a self number, because there is not a number n which added to its sum of digits gives 128860280.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84017 + ... + 85536.

Almost surely, 2^128860280 is an apocalyptic number.

128860280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128860280 is an abundant number, since it is smaller than the sum of its proper divisors (176336920).

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

128860280 is a wasteful number, since it uses less digits than its factorization.

128860280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169583 (or 169579 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 128860280 is about 11351.6641951742. The cubic root of 128860280 is about 505.0949466936.

The spelling of 128860280 in words is "one hundred twenty-eight million, eight hundred sixty thousand, two hundred eighty".