868635042 has 48 divisors (see below), whose sum is σ = 1924801536. Its totient is φ = 261122400.

The previous prime is 868635041. The next prime is 868635049. The reversal of 868635042 is 240536868.

It is a junction number, because it is equal to n+sod(n) for n = 868634985 and 868635003.

It is not an unprimeable number, because it can be changed into a prime (868635041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87492 + ... + 96912.

It is an arithmetic number, because the mean of its divisors is an integer number (40100032).

Almost surely, 2^868635042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 868635042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962400768).

868635042 is an abundant number, since it is smaller than the sum of its proper divisors (1056166494).

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

868635042 is a wasteful number, since it uses less digits than its factorization.

868635042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9575 (or 9564 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 868635042 is about 29472.6151198023. The cubic root of 868635042 is about 954.1407590871.

The spelling of 868635042 in words is "eight hundred sixty-eight million, six hundred thirty-five thousand, forty-two".