23906720 has 24 divisors (see below), whose sum is σ = 56480004. Its totient is φ = 9562624.

The previous prime is 23906711. The next prime is 23906737. The reversal of 23906720 is 2760932.

It can be written as a sum of positive squares in 2 ways, for example, as 23541904 + 364816 = 4852^2 + 604^2 .

It is a super-3 number, since 3×23906720³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 74549 + ... + 74868.

Almost surely, 2^23906720 is an apocalyptic number.

23906720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23906720 is an abundant number, since it is smaller than the sum of its proper divisors (32573284).

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

23906720 is a wasteful number, since it uses less digits than its factorization.

23906720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149432 (or 149424 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 23906720 is about 4889.4498668051. The cubic root of 23906720 is about 288.0757259718.

The spelling of 23906720 in words is "twenty-three million, nine hundred six thousand, seven hundred twenty".