23804640 has 144 divisors (see below), whose sum is σ = 82869696. Its totient is φ = 6220800.

The previous prime is 23804623. The next prime is 23804659. The reversal of 23804640 is 4640832.

It is a Cunningham number, because it is equal to 4879²-1.

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

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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, 87705 + ... + 87975.

It is an arithmetic number, because the mean of its divisors is an integer number (575484).

Almost surely, 2^23804640 is an apocalyptic number.

23804640 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 23804640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41434848).

23804640 is an abundant number, since it is smaller than the sum of its proper divisors (59065056).

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

23804640 is a wasteful number, since it uses less digits than its factorization.

23804640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 23804640 is about 4878.9998975200. Note that the first 3 decimals coincide. The cubic root of 23804640 is about 287.6651200192.

The spelling of 23804640 in words is "twenty-three million, eight hundred four thousand, six hundred forty".