23984640 has 160 divisors (see below), whose sum is σ = 85440960. Its totient is φ = 6377472.

The previous prime is 23984629. The next prime is 23984647. The reversal of 23984640 is 4648932.

It is a happy number.

23984640 is a `hidden beast` number, since 2 + 3 + 9 + 8 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23984595 and 23984604.

It is not an unprimeable number, because it can be changed into a prime (23984647) 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, 68947 + ... + 69293.

It is an arithmetic number, because the mean of its divisors is an integer number (534006).

Almost surely, 2^23984640 is an apocalyptic number.

23984640 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 23984640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42720480).

23984640 is an abundant number, since it is smaller than the sum of its proper divisors (61456320).

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

23984640 is an equidigital number, since it uses as much as digits as its factorization.

23984640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 23984640 is about 4897.4115612229. The cubic root of 23984640 is about 288.3883649475.

The spelling of 23984640 in words is "twenty-three million, nine hundred eighty-four thousand, six hundred forty".