230257728 has 70 divisors (see below), whose sum is σ = 682571406. Its totient is φ = 76750848.

The previous prime is 230257723. The next prime is 230257793. The reversal of 230257728 is 827752032.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 134374464 + 95883264 = 11592^2 + 9792^2 .

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

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 230257692 and 230257701.

It is not an unprimeable number, because it can be changed into a prime (230257721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 17025 + ... + 27392.

Almost surely, 2^230257728 is an apocalyptic number.

It is an amenable number.

230257728 is an abundant number, since it is smaller than the sum of its proper divisors (452313678).

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

230257728 is an equidigital number, since it uses as much as digits as its factorization.

230257728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44441 (or 44422 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 230257728 is about 15174.2455496146. The cubic root of 230257728 is about 612.9213343129.

The spelling of 230257728 in words is "two hundred thirty million, two hundred fifty-seven thousand, seven hundred twenty-eight".