868979072 has 144 divisors (see below), whose sum is σ = 2005661700. Its totient is φ = 374759424.

The previous prime is 868979047. The next prime is 868979087. The reversal of 868979072 is 270979868.

It is a junction number, because it is equal to n+sod(n) for n = 868978999 and 868979017.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 6251579 + ... + 6251717.

Almost surely, 2^868979072 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 868979072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1002830850).

868979072 is an abundant number, since it is smaller than the sum of its proper divisors (1136682628).

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

868979072 is a wasteful number, since it uses less digits than its factorization.

868979072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 56.

The square root of 868979072 is about 29478.4509769425. The cubic root of 868979072 is about 954.2667075401.

The spelling of 868979072 in words is "eight hundred sixty-eight million, nine hundred seventy-nine thousand, seventy-two".