869219904 has 112 divisors (see below), whose sum is σ = 2766771200. Its totient is φ = 235270656.

The previous prime is 869219891. The next prime is 869219909. The reversal of 869219904 is 409912968.

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 (48).

It is not an unprimeable number, because it can be changed into a prime (869219909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8517 + ... + 42555.

Almost surely, 2^869219904 is an apocalyptic number.

869219904 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869219904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1383385600).

869219904 is an abundant number, since it is smaller than the sum of its proper divisors (1897551296).

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

869219904 is a wasteful number, since it uses less digits than its factorization.

869219904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34080 (or 34070 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 869219904 is about 29482.5355761678. The cubic root of 869219904 is about 954.3548557052.

The spelling of 869219904 in words is "eight hundred sixty-nine million, two hundred nineteen thousand, nine hundred four".