210831028 has 6 divisors (see below), whose sum is σ = 368954306. Its totient is φ = 105415512.

The previous prime is 210830999. The next prime is 210831053. The reversal of 210831028 is 820138012.

It can be written as a sum of positive squares in only one way, i.e., 106750224 + 104080804 = 10332^2 + 10202^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210830993 and 210831011.

It is a congruent number.

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, 26353875 + ... + 26353882.

Almost surely, 2^210831028 is an apocalyptic number.

It is an amenable number.

210831028 is a deficient number, since it is larger than the sum of its proper divisors (158123278).

210831028 is a wasteful number, since it uses less digits than its factorization.

210831028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52707761 (or 52707759 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 210831028 is about 14520.0216253282. The cubic root of 210831028 is about 595.1752213268.

The spelling of 210831028 in words is "two hundred ten million, eight hundred thirty-one thousand, twenty-eight".