128646280 has 64 divisors (see below), whose sum is σ = 341498880. Its totient is φ = 42681600.

The previous prime is 128646251. The next prime is 128646281. The reversal of 128646280 is 82646821.

It is not an unprimeable number, because it can be changed into a prime (128646281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1270 + ... + 16090.

It is an arithmetic number, because the mean of its divisors is an integer number (5335920).

Almost surely, 2^128646280 is an apocalyptic number.

128646280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128646280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170749440).

128646280 is an abundant number, since it is smaller than the sum of its proper divisors (212852600).

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

128646280 is a wasteful number, since it uses less digits than its factorization.

128646280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14870 (or 14866 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 128646280 is about 11342.2343477817. The cubic root of 128646280 is about 504.8151857785.

The spelling of 128646280 in words is "one hundred twenty-eight million, six hundred forty-six thousand, two hundred eighty".