233531728 has 20 divisors (see below), whose sum is σ = 457554420. Its totient is φ = 115453184.

The previous prime is 233531713. The next prime is 233531741. The reversal of 233531728 is 827135332.

It can be written as a sum of positive squares in 2 ways, for example, as 37307664 + 196224064 = 6108^2 + 14008^2 .

It is a junction number, because it is equal to n+sod(n) for n = 233531693 and 233531702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80575 + ... + 83422.

It is an arithmetic number, because the mean of its divisors is an integer number (22877721).

Almost surely, 2^233531728 is an apocalyptic number.

It is an amenable number.

233531728 is a deficient number, since it is larger than the sum of its proper divisors (224022692).

233531728 is a wasteful number, since it uses less digits than its factorization.

233531728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164094 (or 164088 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 233531728 is about 15281.7449265455. The cubic root of 233531728 is about 615.8126854992.

The spelling of 233531728 in words is "two hundred thirty-three million, five hundred thirty-one thousand, seven hundred twenty-eight".