128630220 has 24 divisors (see below), whose sum is σ = 360164784. Its totient is φ = 34301376.

The previous prime is 128630219. The next prime is 128630233. The reversal of 128630220 is 22036821.

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 7 ways as a sum of consecutive naturals, for example, 1071859 + ... + 1071978.

It is an arithmetic number, because the mean of its divisors is an integer number (15006866).

Almost surely, 2^128630220 is an apocalyptic number.

128630220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128630220 is an abundant number, since it is smaller than the sum of its proper divisors (231534564).

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

128630220 is a wasteful number, since it uses less digits than its factorization.

128630220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143849 (or 2143847 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 128630220 is about 11341.5263523037. The cubic root of 128630220 is about 504.7941781254.

The spelling of 128630220 in words is "one hundred twenty-eight million, six hundred thirty thousand, two hundred twenty".