23404040 has 64 divisors (see below), whose sum is σ = 58829760. Its totient is φ = 8305920.

The previous prime is 23404033. The next prime is 23404049. The reversal of 23404040 is 4040432.

It is not an unprimeable number, because it can be changed into a prime (23404049) 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, 18302 + ... + 19538.

It is an arithmetic number, because the mean of its divisors is an integer number (919215).

Almost surely, 2^23404040 is an apocalyptic number.

23404040 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 23404040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29414880).

23404040 is an abundant number, since it is smaller than the sum of its proper divisors (35425720).

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

23404040 is a wasteful number, since it uses less digits than its factorization.

23404040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1298 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 23404040 is about 4837.7722145632. The cubic root of 23404040 is about 286.0423103981.

Adding to 23404040 its reverse (4040432), we get a palindrome (27444472).

The spelling of 23404040 in words is "twenty-three million, four hundred four thousand, forty".