23939424 has 72 divisors (see below), whose sum is σ = 68835312. Its totient is φ = 7891200.

The previous prime is 23939423. The next prime is 23939467. The reversal of 23939424 is 42493932.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23939423) 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 11 ways as a sum of consecutive naturals, for example, 28677 + ... + 29499.

It is an arithmetic number, because the mean of its divisors is an integer number (956046).

Almost surely, 2^23939424 is an apocalyptic number.

23939424 is a gapful number since it is divisible by the number (24) 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 23939424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34417656).

23939424 is an abundant number, since it is smaller than the sum of its proper divisors (44895888).

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

23939424 is a wasteful number, since it uses less digits than its factorization.

23939424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 929 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 23939424 is about 4892.7930673594. The cubic root of 23939424 is about 288.2070270701.

The spelling of 23939424 in words is "twenty-three million, nine hundred thirty-nine thousand, four hundred twenty-four".