868747872 has 144 divisors (see below), whose sum is σ = 2449963152. Its totient is φ = 269475840.

The previous prime is 868747871. The next prime is 868747879. The reversal of 868747872 is 278747868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868747871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4799622 + ... + 4799802.

It is an arithmetic number, because the mean of its divisors is an integer number (17013633).

Almost surely, 2^868747872 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 868747872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224981576).

868747872 is an abundant number, since it is smaller than the sum of its proper divisors (1581215280).

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

868747872 is a wasteful number, since it uses less digits than its factorization.

868747872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 376 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 57.

The square root of 868747872 is about 29474.5292074360. The cubic root of 868747872 is about 954.1820695093.

The spelling of 868747872 in words is "eight hundred sixty-eight million, seven hundred forty-seven thousand, eight hundred seventy-two".