8439855 has 16 divisors (see below), whose sum is σ = 13668480. Its totient is φ = 4446368.

The previous prime is 8439817. The next prime is 8439859. The reversal of 8439855 is 5589348.

It is a cyclic number.

It is not a de Polignac number, because 8439855 - 2⁶ = 8439791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8439859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2145 + ... + 4634.

It is an arithmetic number, because the mean of its divisors is an integer number (854280).

Almost surely, 2^8439855 is an apocalyptic number.

8439855 is a deficient number, since it is larger than the sum of its proper divisors (5228625).

8439855 is a wasteful number, since it uses less digits than its factorization.

8439855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870.

The product of its digits is 172800, while the sum is 42.

The square root of 8439855 is about 2905.1428536304. The cubic root of 8439855 is about 203.6002600856.

The spelling of 8439855 in words is "eight million, four hundred thirty-nine thousand, eight hundred fifty-five".