23409216 has 224 divisors, whose sum is σ = 78028800. Its totient is φ = 6842880.

The previous prime is 23409203. The next prime is 23409223. The reversal of 23409216 is 61290432.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 23409216.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 755121 + ... + 755151.

Almost surely, 2^23409216 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 23409216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39014400).

23409216 is an abundant number, since it is smaller than the sum of its proper divisors (54619584).

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

23409216 is a wasteful number, since it uses less digits than its factorization.

23409216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 23409216 is about 4838.3071419661. The cubic root of 23409216 is about 286.0633957301.

Adding to 23409216 its reverse (61290432), we get a palindrome (84699648).

The spelling of 23409216 in words is "twenty-three million, four hundred nine thousand, two hundred sixteen".