23289816 has 64 divisors (see below), whose sum is σ = 64903680. Its totient is φ = 6903680.

The previous prime is 23289811. The next prime is 23289829. The reversal of 23289816 is 61898232.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23289811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11470 + ... + 13346.

It is an arithmetic number, because the mean of its divisors is an integer number (1014120).

Almost surely, 2^23289816 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 23289816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32451840).

23289816 is an abundant number, since it is smaller than the sum of its proper divisors (41613864).

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

23289816 is a wasteful number, since it uses less digits than its factorization.

23289816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944 (or 1940 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 23289816 is about 4825.9523412483. The cubic root of 23289816 is about 285.5762057557.

The spelling of 23289816 in words is "twenty-three million, two hundred eighty-nine thousand, eight hundred sixteen".