868284420 has 72 divisors (see below), whose sum is σ = 2565952704. Its totient is φ = 219350592.

The previous prime is 868284383. The next prime is 868284433. The reversal of 868284420 is 24482868.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1617 + ... + 41703.

It is an arithmetic number, because the mean of its divisors is an integer number (35638232).

Almost surely, 2^868284420 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 868284420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282976352).

868284420 is an abundant number, since it is smaller than the sum of its proper divisors (1697668284).

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

868284420 is a wasteful number, since it uses less digits than its factorization.

868284420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40137 (or 40116 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 42.

The square root of 868284420 is about 29466.6662518854. Note that the first 3 decimals coincide. The cubic root of 868284420 is about 954.0123630990.

The spelling of 868284420 in words is "eight hundred sixty-eight million, two hundred eighty-four thousand, four hundred twenty".