211028868 has 48 divisors (see below), whose sum is σ = 549312960. Its totient is φ = 70060032.

The previous prime is 211028819. The next prime is 211028869. The reversal of 211028868 is 868820112.

It is a super-2 number, since 2×211028868² = 89066366258722848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (211028869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23955 + ... + 31557.

It is an arithmetic number, because the mean of its divisors is an integer number (11444020).

Almost surely, 2^211028868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211028868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274656480).

211028868 is an abundant number, since it is smaller than the sum of its proper divisors (338284092).

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

211028868 is a wasteful number, since it uses less digits than its factorization.

211028868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7873 (or 7865 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 211028868 is about 14526.8326898880. The cubic root of 211028868 is about 595.3613303241.

The spelling of 211028868 in words is "two hundred eleven million, twenty-eight thousand, eight hundred sixty-eight".