866028705388 has 108 divisors (see below), whose sum is σ = 1952628284376. Its totient is φ = 334836902400.

The previous prime is 866028705341. The next prime is 866028705389. The reversal of 866028705388 is 883507820668.

866028705388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (866028705389) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2967420 + ... + 3246172.

It is an arithmetic number, because the mean of its divisors is an integer number (18079891522).

Almost surely, 2^866028705388 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 866028705388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976314142188).

866028705388 is an abundant number, since it is smaller than the sum of its proper divisors (1086599578988).

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

866028705388 is a wasteful number, since it uses less digits than its factorization.

866028705388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278924 (or 278904 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 866028705388 in words is "eight hundred sixty-six billion, twenty-eight million, seven hundred five thousand, three hundred eighty-eight".