866528208 has 240 divisors, whose sum is σ = 3022306560. Its totient is φ = 225662976.

The previous prime is 866528203. The next prime is 866528209. The reversal of 866528208 is 802825668.

866528208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×866528208² = 1501742270519382528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866528203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1165885 + ... + 1166627.

It is an arithmetic number, because the mean of its divisors is an integer number (12592944).

Almost surely, 2^866528208 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 866528208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1511153280).

866528208 is an abundant number, since it is smaller than the sum of its proper divisors (2155778352).

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

866528208 is a wasteful number, since it uses less digits than its factorization.

866528208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 866528208 is about 29436.8511903023. The cubic root of 866528208 is about 953.3687265238.

The spelling of 866528208 in words is "eight hundred sixty-six million, five hundred twenty-eight thousand, two hundred eight".