23721472 has 40 divisors (see below), whose sum is σ = 47950056. Its totient is φ = 11722752.

The previous prime is 23721469. The next prime is 23721473. The reversal of 23721472 is 27412732.

It is a self number, because there is not a number n which added to its sum of digits gives 23721472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23721473) 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 3 ways as a sum of consecutive naturals, for example, 54568 + ... + 55000.

Almost surely, 2^23721472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23721472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23975028).

23721472 is an abundant number, since it is smaller than the sum of its proper divisors (24228584).

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

23721472 is an equidigital number, since it uses as much as digits as its factorization.

23721472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 542 counting only the distinct ones).

The product of its digits is 4704, while the sum is 28.

The square root of 23721472 is about 4870.4693818974. The cubic root of 23721472 is about 287.3297169325.

It can be divided in two parts, 2372 and 1472, that added together give a square (3844 = 62²).

The spelling of 23721472 in words is "twenty-three million, seven hundred twenty-one thousand, four hundred seventy-two".