128280220684 has 48 divisors (see below), whose sum is σ = 279913132800. Its totient is φ = 49974125760.

The previous prime is 128280220639. The next prime is 128280220693. The reversal of 128280220684 is 486022082821.

It is a self number, because there is not a number n which added to its sum of digits gives 128280220684.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4466779 + ... + 4495405.

It is an arithmetic number, because the mean of its divisors is an integer number (5831523600).

Almost surely, 2^128280220684 is an apocalyptic number.

128280220684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128280220684 is an abundant number, since it is smaller than the sum of its proper divisors (151632912116).

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

128280220684 is a wasteful number, since it uses less digits than its factorization.

128280220684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43198 (or 43196 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 128280220684 in words is "one hundred twenty-eight billion, two hundred eighty million, two hundred twenty thousand, six hundred eighty-four".