868538916 has 144 divisors (see below), whose sum is σ = 2683961280. Its totient is φ = 242040960.

The previous prime is 868538833. The next prime is 868538921. The reversal of 868538916 is 619835868.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214971 + ... + 218973.

It is an arithmetic number, because the mean of its divisors is an integer number (18638620).

Almost surely, 2^868538916 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 868538916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341980640).

868538916 is an abundant number, since it is smaller than the sum of its proper divisors (1815422364).

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

868538916 is a wasteful number, since it uses less digits than its factorization.

868538916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4071 (or 4056 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 868538916 is about 29470.9843066023. The cubic root of 868538916 is about 954.1055616745.

The spelling of 868538916 in words is "eight hundred sixty-eight million, five hundred thirty-eight thousand, nine hundred sixteen".