23323140 has 72 divisors (see below), whose sum is σ = 73382400. Its totient is φ = 6218208.

The previous prime is 23323121. The next prime is 23323147. The reversal of 23323140 is 4132332.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (23323147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2461 + ... + 7259.

It is an arithmetic number, because the mean of its divisors is an integer number (1019200).

Almost surely, 2^23323140 is an apocalyptic number.

23323140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23323140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36691200).

23323140 is an abundant number, since it is smaller than the sum of its proper divisors (50059260).

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

23323140 is a wasteful number, since it uses less digits than its factorization.

23323140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823 (or 4809 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 23323140 is about 4829.4036898980. The cubic root of 23323140 is about 285.7123454630.

Adding to 23323140 its reverse (4132332), we get a palindrome (27455472).

The spelling of 23323140 in words is "twenty-three million, three hundred twenty-three thousand, one hundred forty".