23320144 has 40 divisors (see below), whose sum is σ = 48746880. Its totient is φ = 10771200.

The previous prime is 23320133. The next prime is 23320151. The reversal of 23320144 is 44102332.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11529 + ... + 13399.

It is an arithmetic number, because the mean of its divisors is an integer number (1218672).

Almost surely, 2^23320144 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 23320144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24373440).

23320144 is an abundant number, since it is smaller than the sum of its proper divisors (25426736).

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

23320144 is a wasteful number, since it uses less digits than its factorization.

23320144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939 (or 1933 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23320144 is about 4829.0934967134. The cubic root of 23320144 is about 285.7001111063.

Adding to 23320144 its reverse (44102332), we get a palindrome (67422476).

The spelling of 23320144 in words is "twenty-three million, three hundred twenty thousand, one hundred forty-four".