23545728 has 96 divisors (see below), whose sum is σ = 70357560. Its totient is φ = 7838208.

The previous prime is 23545723. The next prime is 23545757. The reversal of 23545728 is 82754532.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a junction number, because it is equal to n+sod(n) for n = 23545692 and 23545701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23545723) 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, 30726 + ... + 31482.

Almost surely, 2^23545728 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 23545728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35178780).

23545728 is an abundant number, since it is smaller than the sum of its proper divisors (46811832).

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

23545728 is an frugal number, since it uses more digits than its factorization.

23545728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786 (or 762 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 23545728 is about 4852.3940483023. The cubic root of 23545728 is about 286.6183825895.

The spelling of 23545728 in words is "twenty-three million, five hundred forty-five thousand, seven hundred twenty-eight".