128430984 has 32 divisors (see below), whose sum is σ = 350267040. Its totient is φ = 38918400.

The previous prime is 128430961. The next prime is 128431001. The reversal of 128430984 is 489034821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242977 + ... + 243504.

It is an arithmetic number, because the mean of its divisors is an integer number (10945845).

Almost surely, 2^128430984 is an apocalyptic number.

It is an amenable number.

128430984 is an abundant number, since it is smaller than the sum of its proper divisors (221836056).

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

128430984 is a wasteful number, since it uses less digits than its factorization.

128430984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486501 (or 486497 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 128430984 is about 11332.7394746372. The cubic root of 128430984 is about 504.5334173604.

The spelling of 128430984 in words is "one hundred twenty-eight million, four hundred thirty thousand, nine hundred eighty-four".