868444838 has 4 divisors (see below), whose sum is σ = 1302667260. Its totient is φ = 434222418.

The previous prime is 868444793. The next prime is 868444859. The reversal of 868444838 is 838444868.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 868444838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217111208 + ... + 217111211.

It is an arithmetic number, because the mean of its divisors is an integer number (325666815).

Almost surely, 2^868444838 is an apocalyptic number.

868444838 is a deficient number, since it is larger than the sum of its proper divisors (434222422).

868444838 is a wasteful number, since it uses less digits than its factorization.

868444838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434222421.

The product of its digits is 4718592, while the sum is 53.

The square root of 868444838 is about 29469.3881510967. The cubic root of 868444838 is about 954.0711116410.

The spelling of 868444838 in words is "eight hundred sixty-eight million, four hundred forty-four thousand, eight hundred thirty-eight".