23171328 has 108 divisors (see below), whose sum is σ = 68157180. Its totient is φ = 7569408.

The previous prime is 23171299. The next prime is 23171339. The reversal of 23171328 is 82317132.

It can be written as a sum of positive squares in 2 ways, for example, as 1937664 + 21233664 = 1392^2 + 4608^2 .

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (2016) is a multiple of the sum of its prime factors (224).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205000 + ... + 205112.

It is an arithmetic number, because the mean of its divisors is an integer number (631085).

Almost surely, 2^23171328 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 23171328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34078590).

23171328 is an abundant number, since it is smaller than the sum of its proper divisors (44985852).

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

23171328 is a wasteful number, since it uses less digits than its factorization.

23171328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224 (or 207 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 23171328 is about 4813.6605613608. The cubic root of 23171328 is about 285.0910881513.

The spelling of 23171328 in words is "twenty-three million, one hundred seventy-one thousand, three hundred twenty-eight".