23943040 has 128 divisors (see below), whose sum is σ = 66096000. Its totient is φ = 8202240.

The previous prime is 23943019. The next prime is 23943041. The reversal of 23943040 is 4034932.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 23942996 and 23943014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23943041) 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, 133671 + ... + 133849.

It is an arithmetic number, because the mean of its divisors is an integer number (516375).

Almost surely, 2^23943040 is an apocalyptic number.

23943040 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 23943040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33048000).

23943040 is an abundant number, since it is smaller than the sum of its proper divisors (42152960).

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

23943040 is a wasteful number, since it uses less digits than its factorization.

23943040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 23943040 is about 4893.1625764939. The cubic root of 23943040 is about 288.2215373627.

Adding to 23943040 its reverse (4034932), we get a palindrome (27977972).

The spelling of 23943040 in words is "twenty-three million, nine hundred forty-three thousand, forty".