869209152 has 112 divisors (see below), whose sum is σ = 2646346752. Its totient is φ = 246643200.

The previous prime is 869209147. The next prime is 869209163. The reversal of 869209152 is 251902968.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200803 + ... + 205085.

It is an arithmetic number, because the mean of its divisors is an integer number (23628096).

Almost surely, 2^869209152 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 869209152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323173376).

869209152 is an abundant number, since it is smaller than the sum of its proper divisors (1777137600).

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

869209152 is a wasteful number, since it uses less digits than its factorization.

869209152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456 (or 4446 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 869209152 is about 29482.3532303648. The cubic root of 869209152 is about 954.3509206573.

The spelling of 869209152 in words is "eight hundred sixty-nine million, two hundred nine thousand, one hundred fifty-two".