128828732 has 12 divisors (see below), whose sum is σ = 227683176. Its totient is φ = 63776400.

The previous prime is 128828723. The next prime is 128828747. The reversal of 128828732 is 237828821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128828732.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159038 + ... + 159845.

It is an arithmetic number, because the mean of its divisors is an integer number (18973598).

Almost surely, 2^128828732 is an apocalyptic number.

It is an amenable number.

128828732 is a deficient number, since it is larger than the sum of its proper divisors (98854444).

128828732 is a wasteful number, since it uses less digits than its factorization.

128828732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318988 (or 318986 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 128828732 is about 11350.2745341247. The cubic root of 128828732 is about 505.0537236574.

The spelling of 128828732 in words is "one hundred twenty-eight million, eight hundred twenty-eight thousand, seven hundred thirty-two".