128031232 has 80 divisors (see below), whose sum is σ = 295606080. Its totient is φ = 54263808.

The previous prime is 128031229. The next prime is 128031263. The reversal of 128031232 is 232130821.

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, 498048 + ... + 498304.

It is an arithmetic number, because the mean of its divisors is an integer number (3695076).

Almost surely, 2^128031232 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 128031232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147803040).

128031232 is an abundant number, since it is smaller than the sum of its proper divisors (167574848).

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

128031232 is an equidigital number, since it uses as much as digits as its factorization.

128031232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 128031232 is about 11315.0886872353. The cubic root of 128031232 is about 504.0094060561.

The spelling of 128031232 in words is "one hundred twenty-eight million, thirty-one thousand, two hundred thirty-two".