868643424 has 216 divisors, whose sum is σ = 2875928328. Its totient is φ = 245790720.

The previous prime is 868643417. The next prime is 868643453. The reversal of 868643424 is 424346868.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 868643424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6839649 + ... + 6839775.

It is an arithmetic number, because the mean of its divisors is an integer number (13314483).

Almost surely, 2^868643424 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 868643424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1437964164).

868643424 is an abundant number, since it is smaller than the sum of its proper divisors (2007284904).

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

868643424 is a wasteful number, since it uses less digits than its factorization.

868643424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 160 counting only the distinct ones).

The product of its digits is 884736, while the sum is 45.

The square root of 868643424 is about 29472.7573192601. The cubic root of 868643424 is about 954.1438281099.

The spelling of 868643424 in words is "eight hundred sixty-eight million, six hundred forty-three thousand, four hundred twenty-four".