866882128 has 60 divisors (see below), whose sum is σ = 1962811872. Its totient is φ = 369808320.

The previous prime is 866882111. The next prime is 866882141. The reversal of 866882128 is 821288668.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175533 + ... + 180403.

Almost surely, 2^866882128 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 866882128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981405936).

866882128 is an abundant number, since it is smaller than the sum of its proper divisors (1095929744).

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

866882128 is a wasteful number, since it uses less digits than its factorization.

866882128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120 (or 5107 counting only the distinct ones).

The product of its digits is 589824, while the sum is 49.

The square root of 866882128 is about 29442.8620891380. The cubic root of 866882128 is about 953.4985050775.

The spelling of 866882128 in words is "eight hundred sixty-six million, eight hundred eighty-two thousand, one hundred twenty-eight".