849409854 has 8 divisors (see below), whose sum is σ = 1698819720. Its totient is φ = 283136616.

The previous prime is 849409819. The next prime is 849409867. The reversal of 849409854 is 458904948.

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

849409854 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 849409797 and 849409806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70784149 + ... + 70784160.

It is an arithmetic number, because the mean of its divisors is an integer number (212352465).

Almost surely, 2^849409854 is an apocalyptic number.

849409854 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

849409854 is a wasteful number, since it uses less digits than its factorization.

849409854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141568314.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 849409854 is about 29144.6367965017. The cubic root of 849409854 is about 947.0489603285.

The spelling of 849409854 in words is "eight hundred forty-nine million, four hundred nine thousand, eight hundred fifty-four".