869109912 has 192 divisors, whose sum is σ = 2696803200. Its totient is φ = 260029440.

The previous prime is 869109881. The next prime is 869109919. The reversal of 869109912 is 219901968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869109919) 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, 2074039 + ... + 2074457.

It is an arithmetic number, because the mean of its divisors is an integer number (14045850).

Almost surely, 2^869109912 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 869109912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348401600).

869109912 is an abundant number, since it is smaller than the sum of its proper divisors (1827693288).

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

869109912 is a wasteful number, since it uses less digits than its factorization.

869109912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 869109912 is about 29480.6701416369. The cubic root of 869109912 is about 954.3145989850.

The spelling of 869109912 in words is "eight hundred sixty-nine million, one hundred nine thousand, nine hundred twelve".