866839104 has 112 divisors (see below), whose sum is σ = 2558125440. Its totient is φ = 287838720.

The previous prime is 866839079. The next prime is 866839117. The reversal of 866839104 is 401938668.

It is a self number, because there is not a number n which added to its sum of digits gives 866839104.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536602 + ... + 538214.

Almost surely, 2^866839104 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 866839104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279062720).

866839104 is an abundant number, since it is smaller than the sum of its proper divisors (1691286336).

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

866839104 is a wasteful number, since it uses less digits than its factorization.

866839104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945 (or 1929 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 866839104 is about 29442.1314445812. The cubic root of 866839104 is about 953.4827305383.

The spelling of 866839104 in words is "eight hundred sixty-six million, eight hundred thirty-nine thousand, one hundred four".