23209328 has 40 divisors (see below), whose sum is σ = 47127936. Its totient is φ = 11059200.

The previous prime is 23209327. The next prime is 23209339. The reversal of 23209328 is 82390232.

It is a self number, because there is not a number n which added to its sum of digits gives 23209328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23209327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35888 + ... + 36528.

Almost surely, 2^23209328 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 23209328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23563968).

23209328 is an abundant number, since it is smaller than the sum of its proper divisors (23918608).

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

23209328 is a wasteful number, since it uses less digits than its factorization.

23209328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 23209328 is about 4817.6060444997. The cubic root of 23209328 is about 285.2468488195.

The spelling of 23209328 in words is "twenty-three million, two hundred nine thousand, three hundred twenty-eight".