231286928 has 10 divisors (see below), whose sum is σ = 448118454. Its totient is φ = 115643456.

The previous prime is 231286907. The next prime is 231286933. The reversal of 231286928 is 829682132.

It can be written as a sum of positive squares in only one way, i.e., 211644304 + 19642624 = 14548^2 + 4432^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7227701 + ... + 7227732.

Almost surely, 2^231286928 is an apocalyptic number.

It is an amenable number.

231286928 is a deficient number, since it is larger than the sum of its proper divisors (216831526).

231286928 is a wasteful number, since it uses less digits than its factorization.

231286928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14455441 (or 14455435 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 231286928 is about 15208.1204624372. The cubic root of 231286928 is about 613.8331836819.

The spelling of 231286928 in words is "two hundred thirty-one million, two hundred eighty-six thousand, nine hundred twenty-eight".