231250028 has 12 divisors (see below), whose sum is σ = 411547080. Its totient is φ = 113665152.

The previous prime is 231250021. The next prime is 231250039. The reversal of 231250028 is 820052132.

It is a junction number, because it is equal to n+sod(n) for n = 231249985 and 231250012.

It is not an unprimeable number, because it can be changed into a prime (231250021) 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 3 ways as a sum of consecutive naturals, for example, 489701 + ... + 490172.

It is an arithmetic number, because the mean of its divisors is an integer number (34295590).

Almost surely, 2^231250028 is an apocalyptic number.

It is an amenable number.

231250028 is a deficient number, since it is larger than the sum of its proper divisors (180297052).

231250028 is a wasteful number, since it uses less digits than its factorization.

231250028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979936 (or 979934 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 231250028 is about 15206.9072463799. The cubic root of 231250028 is about 613.8005378693.

The spelling of 231250028 in words is "two hundred thirty-one million, two hundred fifty thousand, twenty-eight".