868717872 has 100 divisors (see below), whose sum is σ = 2742941256. Its totient is φ = 263243520.

The previous prime is 868717847. The next prime is 868717879. The reversal of 868717872 is 278717868.

868717872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×868717872² = 1509341482264416768, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (868717879) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16213 + ... + 44724.

Almost surely, 2^868717872 is an apocalyptic number.

It is an amenable number.

868717872 is an abundant number, since it is smaller than the sum of its proper divisors (1874223384).

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

868717872 is a wasteful number, since it uses less digits than its factorization.

868717872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60968 (or 60953 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 54.

The square root of 868717872 is about 29474.0202890613. The cubic root of 868717872 is about 954.1710859653.

The spelling of 868717872 in words is "eight hundred sixty-eight million, seven hundred seventeen thousand, eight hundred seventy-two".