23833440 has 144 divisors (see below), whose sum is σ = 84481488. Its totient is φ = 6345216.

The previous prime is 23833421. The next prime is 23833477. The reversal of 23833440 is 4433832.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38574 + ... + 39186.

It is an arithmetic number, because the mean of its divisors is an integer number (586677).

Almost surely, 2^23833440 is an apocalyptic number.

23833440 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 23833440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42240744).

23833440 is an abundant number, since it is smaller than the sum of its proper divisors (60648048).

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

23833440 is an equidigital number, since it uses as much as digits as its factorization.

23833440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 23833440 is about 4881.9504298999. The cubic root of 23833440 is about 287.7810836381.

The spelling of 23833440 in words is "twenty-three million, eight hundred thirty-three thousand, four hundred forty".