23033440 has 48 divisors (see below), whose sum is σ = 54704160. Its totient is φ = 9164800.

The previous prime is 23033411. The next prime is 23033441. The reversal of 23033440 is 4433032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23033441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57240 + ... + 57640.

It is an arithmetic number, because the mean of its divisors is an integer number (1139670).

Almost surely, 2^23033440 is an apocalyptic number.

23033440 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 23033440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27352080).

23033440 is an abundant number, since it is smaller than the sum of its proper divisors (31670720).

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

23033440 is a wasteful number, since it uses less digits than its factorization.

23033440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 23033440 is about 4799.3166180197. The cubic root of 23033440 is about 284.5244557540.

Adding to 23033440 its reverse (4433032), we get a palindrome (27466472).

It can be divided in two parts, 230 and 33440, that added together give a triangular number (33670 = T₂₅₉).

The spelling of 23033440 in words is "twenty-three million, thirty-three thousand, four hundred forty".