230781128 has 36 divisors (see below), whose sum is σ = 446937585. Its totient is φ = 111716800.

The previous prime is 230781127. The next prime is 230781181. The reversal of 230781128 is 821187032.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 164814244 + 65966884 = 12838^2 + 8122^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10742.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230781094 and 230781103.

It is not an unprimeable number, because it can be changed into a prime (230781121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1761623 + ... + 1761753.

Almost surely, 2^230781128 is an apocalyptic number.

It is an amenable number.

230781128 is a deficient number, since it is larger than the sum of its proper divisors (216156457).

230781128 is an equidigital number, since it uses as much as digits as its factorization.

230781128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 230781128 is about 15191.4820870118. The cubic root of 230781128 is about 613.3853943941.

Multiplying 230781128 by its sum of digits (32), we get a square (7384996096 = 85936²).

The spelling of 230781128 in words is "two hundred thirty million, seven hundred eighty-one thousand, one hundred twenty-eight".