869806080 has 624 divisors, whose sum is σ = 3660394080. Its totient is φ = 194641920.

The previous prime is 869806079. The next prime is 869806097. The reversal of 869806080 is 80608968.

It is a tau number, because it is divible by the number of its divisors (624).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66908154 + ... + 66908166.

Almost surely, 2^869806080 is an apocalyptic number.

869806080 is a gapful number since it is divisible by the number (80) 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 869806080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830197040).

869806080 is an abundant number, since it is smaller than the sum of its proper divisors (2790588000).

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

869806080 is a wasteful number, since it uses less digits than its factorization.

869806080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 869806080 is about 29492.4749724400. The cubic root of 869806080 is about 954.5693369906.

The spelling of 869806080 in words is "eight hundred sixty-nine million, eight hundred six thousand, eighty".