869780808 has 96 divisors (see below), whose sum is σ = 2616314400. Its totient is φ = 267613632.

The previous prime is 869780783. The next prime is 869780819. The reversal of 869780808 is 808087968.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 23 ways as a sum of consecutive naturals, for example, 24591 + ... + 48417.

It is an arithmetic number, because the mean of its divisors is an integer number (27253275).

Almost surely, 2^869780808 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 869780808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308157200).

869780808 is an abundant number, since it is smaller than the sum of its proper divisors (1746533592).

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

869780808 is a wasteful number, since it uses less digits than its factorization.

869780808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23868 (or 23845 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 869780808 is about 29492.0465210538. The cubic root of 869780808 is about 954.5600919759.

The spelling of 869780808 in words is "eight hundred sixty-nine million, seven hundred eighty thousand, eight hundred eight".