23916640 has 96 divisors (see below), whose sum is σ = 62705664. Its totient is φ = 8547840.

The previous prime is 23916631. The next prime is 23916647. The reversal of 23916640 is 4661932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23916647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188257 + ... + 188383.

It is an arithmetic number, because the mean of its divisors is an integer number (653184).

Almost surely, 2^23916640 is an apocalyptic number.

23916640 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 23916640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31352832).

23916640 is an abundant number, since it is smaller than the sum of its proper divisors (38789024).

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

23916640 is a wasteful number, since it uses less digits than its factorization.

23916640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 23916640 is about 4890.4641906469. The cubic root of 23916640 is about 288.1155657606.

The spelling of 23916640 in words is "twenty-three million, nine hundred sixteen thousand, six hundred forty".