23408840 has 128 divisors (see below), whose sum is σ = 66528000. Its totient is φ = 7216128.

The previous prime is 23408839. The next prime is 23408849. The reversal of 23408840 is 4880432.

It is a super-3 number, since 3×23408840³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23408849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214706 + ... + 214814.

It is an arithmetic number, because the mean of its divisors is an integer number (519750).

Almost surely, 2^23408840 is an apocalyptic number.

23408840 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 23408840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33264000).

23408840 is an abundant number, since it is smaller than the sum of its proper divisors (43119160).

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

23408840 is a wasteful number, since it uses less digits than its factorization.

23408840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 23408840 is about 4838.2682852442. The cubic root of 23408840 is about 286.0618641337.

The spelling of 23408840 in words is "twenty-three million, four hundred eight thousand, eight hundred forty".