8439842 has 8 divisors (see below), whose sum is σ = 12690432. Its totient is φ = 4209700.

The previous prime is 8439817. The next prime is 8439859. The reversal of 8439842 is 2489348.

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

It is a junction number, because it is equal to n+sod(n) for n = 8439796 and 8439805.

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, 4034 + ... + 5757.

It is an arithmetic number, because the mean of its divisors is an integer number (1586304).

Almost surely, 2^8439842 is an apocalyptic number.

8439842 is a deficient number, since it is larger than the sum of its proper divisors (4250590).

8439842 is a wasteful number, since it uses less digits than its factorization.

8439842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10224.

The product of its digits is 55296, while the sum is 38.

The square root of 8439842 is about 2905.1406162181. The cubic root of 8439842 is about 203.6001555497.

The spelling of 8439842 in words is "eight million, four hundred thirty-nine thousand, eight hundred forty-two".