230723728 has 60 divisors (see below), whose sum is σ = 486851652. Its totient is φ = 105840640.

The previous prime is 230723723. The next prime is 230723743. The reversal of 230723728 is 827327032.

It is a happy number.

230723728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 1140624 + 229583104 = 1068^2 + 15152^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 230723693 and 230723702.

It is not an unprimeable number, because it can be changed into a prime (230723723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188976 + ... + 190192.

Almost surely, 2^230723728 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 230723728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243425826).

230723728 is an abundant number, since it is smaller than the sum of its proper divisors (256127924).

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

230723728 is a wasteful number, since it uses less digits than its factorization.

230723728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300 (or 1277 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 230723728 is about 15189.5927529345. The cubic root of 230723728 is about 613.3345363345.

The spelling of 230723728 in words is "two hundred thirty million, seven hundred twenty-three thousand, seven hundred twenty-eight".