128584992 has 24 divisors (see below), whose sum is σ = 337535856. Its totient is φ = 42861632.

The previous prime is 128584933. The next prime is 128585021. The reversal of 128584992 is 299485821.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 669618 + ... + 669809.

It is an arithmetic number, because the mean of its divisors is an integer number (14063994).

Almost surely, 2^128584992 is an apocalyptic number.

128584992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128584992 is an abundant number, since it is smaller than the sum of its proper divisors (208950864).

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

128584992 is a wasteful number, since it uses less digits than its factorization.

128584992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339440 (or 1339432 counting only the distinct ones).

The product of its digits is 414720, while the sum is 48.

The square root of 128584992 is about 11339.5322654861. The cubic root of 128584992 is about 504.7350072000.

The spelling of 128584992 in words is "one hundred twenty-eight million, five hundred eighty-four thousand, nine hundred ninety-two".