869169888 has 72 divisors (see below), whose sum is σ = 2481530688. Its totient is φ = 288571392.

The previous prime is 869169871. The next prime is 869169893. The reversal of 869169888 is 888961968.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 68145 + ... + 79887.

It is an arithmetic number, because the mean of its divisors is an integer number (34465704).

Almost surely, 2^869169888 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 869169888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240765344).

869169888 is an abundant number, since it is smaller than the sum of its proper divisors (1612360800).

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

869169888 is a wasteful number, since it uses less digits than its factorization.

869169888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12016 (or 12005 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 63.

The square root of 869169888 is about 29481.6873329869. The cubic root of 869169888 is about 954.3365504302.

The spelling of 869169888 in words is "eight hundred sixty-nine million, one hundred sixty-nine thousand, eight hundred eighty-eight".