23173728 has 24 divisors (see below), whose sum is σ = 60831288. Its totient is φ = 7724544.

The previous prime is 23173723. The next prime is 23173751. The reversal of 23173728 is 82737132.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23173723) 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, 120601 + ... + 120792.

It is an arithmetic number, because the mean of its divisors is an integer number (2534637).

Almost surely, 2^23173728 is an apocalyptic number.

It is an amenable number.

23173728 is an abundant number, since it is smaller than the sum of its proper divisors (37657560).

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

23173728 is a wasteful number, since it uses less digits than its factorization.

23173728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241406 (or 241398 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 23173728 is about 4813.9098454375. The cubic root of 23173728 is about 285.1009307031.

The spelling of 23173728 in words is "twenty-three million, one hundred seventy-three thousand, seven hundred twenty-eight".