128580984 has 48 divisors (see below), whose sum is σ = 397990320. Its totient is φ = 36737280.

The previous prime is 128580967. The next prime is 128580989. The reversal of 128580984 is 489085821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128580989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127057 + ... + 128064.

It is an arithmetic number, because the mean of its divisors is an integer number (8291465).

Almost surely, 2^128580984 is an apocalyptic number.

128580984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128580984 is an abundant number, since it is smaller than the sum of its proper divisors (269409336).

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

128580984 is a wasteful number, since it uses less digits than its factorization.

128580984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255140 (or 255133 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The square root of 128580984 is about 11339.3555372428. The cubic root of 128580984 is about 504.7297629412.

The spelling of 128580984 in words is "one hundred twenty-eight million, five hundred eighty thousand, nine hundred eighty-four".