210668244 has 24 divisors (see below), whose sum is σ = 492141888. Its totient is φ = 70139520.

The previous prime is 210668243. The next prime is 210668279. The reversal of 210668244 is 442866012.

It is a super-2 number, since 2×210668244² = 88762218060087072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210668243) 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 7 ways as a sum of consecutive naturals, for example, 609 + ... + 20535.

It is an arithmetic number, because the mean of its divisors is an integer number (20505912).

Almost surely, 2^210668244 is an apocalyptic number.

It is an amenable number.

210668244 is an abundant number, since it is smaller than the sum of its proper divisors (281473644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210668244 is a wasteful number, since it uses less digits than its factorization.

210668244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20815 (or 20813 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 210668244 is about 14514.4150416061. The cubic root of 210668244 is about 595.0220023406.

The spelling of 210668244 in words is "two hundred ten million, six hundred sixty-eight thousand, two hundred forty-four".