868021672 has 48 divisors (see below), whose sum is σ = 1900480320. Its totient is φ = 370591200.

The previous prime is 868021667. The next prime is 868021673. The reversal of 868021672 is 276120868.

It is not an unprimeable number, because it can be changed into a prime (868021673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102147 + ... + 110317.

It is an arithmetic number, because the mean of its divisors is an integer number (39593340).

Almost surely, 2^868021672 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 868021672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950240160).

868021672 is an abundant number, since it is smaller than the sum of its proper divisors (1032458648).

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

868021672 is a wasteful number, since it uses less digits than its factorization.

868021672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8462 (or 8451 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 868021672 is about 29462.2075208223. The cubic root of 868021672 is about 953.9161234632.

The spelling of 868021672 in words is "eight hundred sixty-eight million, twenty-one thousand, six hundred seventy-two".