868280080 has 80 divisors (see below), whose sum is σ = 2079063360. Its totient is φ = 337042944.

The previous prime is 868280071. The next prime is 868280093. The reversal of 868280080 is 80082868.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 594391 + ... + 595849.

It is an arithmetic number, because the mean of its divisors is an integer number (25988292).

Almost surely, 2^868280080 is an apocalyptic number.

868280080 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 868280080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1039531680).

868280080 is an abundant number, since it is smaller than the sum of its proper divisors (1210783280).

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

868280080 is a wasteful number, since it uses less digits than its factorization.

868280080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688 (or 1682 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 868280080 is about 29466.5926092584. The cubic root of 868280080 is about 954.0107735966.

The spelling of 868280080 in words is "eight hundred sixty-eight million, two hundred eighty thousand, eighty".