866088288 has 120 divisors (see below), whose sum is σ = 2743182288. Its totient is φ = 266478336.

The previous prime is 866088287. The next prime is 866088319. The reversal of 866088288 is 882880668.

866088288 is a `hidden beast` number, since 8 + 6 + 608 + 8 + 28 + 8 = 666.

It is a super-2 number, since 2×866088288² = 1500217845221541888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866088283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20845 + ... + 46547.

Almost surely, 2^866088288 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 866088288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1371591144).

866088288 is an abundant number, since it is smaller than the sum of its proper divisors (1877094000).

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

866088288 is a wasteful number, since it uses less digits than its factorization.

866088288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25738 (or 25721 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 54.

The square root of 866088288 is about 29429.3779750779. The cubic root of 866088288 is about 953.2073634502.

The spelling of 866088288 in words is "eight hundred sixty-six million, eighty-eight thousand, two hundred eighty-eight".