23128328 has 8 divisors (see below), whose sum is σ = 43365630. Its totient is φ = 11564160.

The previous prime is 23128327. The next prime is 23128337. The reversal of 23128328 is 82382132.

It can be written as a sum of positive squares in only one way, i.e., 20811844 + 2316484 = 4562^2 + 1522^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 23128328.

It is not an unprimeable number, because it can be changed into a prime (23128327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445513 + ... + 1445528.

Almost surely, 2^23128328 is an apocalyptic number.

It is an amenable number.

23128328 is a deficient number, since it is larger than the sum of its proper divisors (20237302).

23128328 is a wasteful number, since it uses less digits than its factorization.

23128328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891047 (or 2891043 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 23128328 is about 4809.1920319322. The cubic root of 23128328 is about 284.9146271424.

The spelling of 23128328 in words is "twenty-three million, one hundred twenty-eight thousand, three hundred twenty-eight".