23497728 has 44 divisors (see below), whose sum is σ = 62638200. Its totient is φ = 7831552.

The previous prime is 23497717. The next prime is 23497729. The reversal of 23497728 is 82779432.

It is a super-3 number, since 3×23497728³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23497728.

It is not an unprimeable number, because it can be changed into a prime (23497729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753 + ... + 6896.

Almost surely, 2^23497728 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 23497728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31319100).

23497728 is an abundant number, since it is smaller than the sum of its proper divisors (39140472).

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

23497728 is an equidigital number, since it uses as much as digits as its factorization.

23497728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7672 (or 7654 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 23497728 is about 4847.4455128449. The cubic root of 23497728 is about 286.4234846487.

The spelling of 23497728 in words is "twenty-three million, four hundred ninety-seven thousand, seven hundred twenty-eight".