128984364 has 18 divisors (see below), whose sum is σ = 326043900. Its totient is φ = 42994776.

The previous prime is 128984363. The next prime is 128984377. The reversal of 128984364 is 463489821.

It is a happy number.

128984364 is a `hidden beast` number, since 1 + 289 + 8 + 4 + 364 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (128984363) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1791414 + ... + 1791485.

It is an arithmetic number, because the mean of its divisors is an integer number (18113550).

Almost surely, 2^128984364 is an apocalyptic number.

It is an amenable number.

128984364 is an abundant number, since it is smaller than the sum of its proper divisors (197059536).

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

128984364 is a wasteful number, since it uses less digits than its factorization.

128984364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582909 (or 3582904 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 128984364 is about 11357.1283342225. The cubic root of 128984364 is about 505.2570191209.

The spelling of 128984364 in words is "one hundred twenty-eight million, nine hundred eighty-four thousand, three hundred sixty-four".