865044842 has 8 divisors (see below), whose sum is σ = 1297895232. Its totient is φ = 432413100.

The previous prime is 865044809. The next prime is 865044883. The reversal of 865044842 is 248440568.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 865044842.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44384 + ... + 60827.

It is an arithmetic number, because the mean of its divisors is an integer number (162236904).

Almost surely, 2^865044842 is an apocalyptic number.

865044842 is a deficient number, since it is larger than the sum of its proper divisors (432850390).

865044842 is a wasteful number, since it uses less digits than its factorization.

865044842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109324.

The product of its (nonzero) digits is 245760, while the sum is 41.

The square root of 865044842 is about 29411.6446666962. The cubic root of 865044842 is about 952.8244078382.

The spelling of 865044842 in words is "eight hundred sixty-five million, forty-four thousand, eight hundred forty-two".