868996836 has 120 divisors (see below), whose sum is σ = 2361300480. Its totient is φ = 278380800.

The previous prime is 868996831. The next prime is 868996883. The reversal of 868996836 is 638699868.

It is not an unprimeable number, because it can be changed into a prime (868996831) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2420425 + ... + 2420783.

It is an arithmetic number, because the mean of its divisors is an integer number (19677504).

Almost surely, 2^868996836 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 868996836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180650240).

868996836 is an abundant number, since it is smaller than the sum of its proper divisors (1492303644).

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

868996836 is a wasteful number, since it uses less digits than its factorization.

868996836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 636 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The square root of 868996836 is about 29478.7522802442. The cubic root of 868996836 is about 954.2732099898.

The spelling of 868996836 in words is "eight hundred sixty-eight million, nine hundred ninety-six thousand, eight hundred thirty-six".