128535984 has 150 divisors (see below), whose sum is σ = 387778380. Its totient is φ = 41091840.

The previous prime is 128535919. The next prime is 128536027. The reversal of 128535984 is 489535821.

128535984 is a `hidden beast` number, since 1 + 2 + 8 + 53 + 598 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2178547 + ... + 2178605.

Almost surely, 2^128535984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128535984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193889190).

128535984 is an abundant number, since it is smaller than the sum of its proper divisors (259242396).

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

128535984 is an equidigital number, since it uses as much as digits as its factorization.

128535984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 105 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 128535984 is about 11337.3711238541. The cubic root of 128535984 is about 504.6708753079.

The spelling of 128535984 in words is "one hundred twenty-eight million, five hundred thirty-five thousand, nine hundred eighty-four".