6398885 has 16 divisors (see below), whose sum is σ = 8237376. Its totient is φ = 4754688.

The previous prime is 6398881. The next prime is 6398897. The reversal of 6398885 is 5888936.

It is a cyclic number.

It is not a de Polignac number, because 6398885 - 2² = 6398881 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 3¹³ + 9⁷ + 8² + 8³ + 8⁴ + 5⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6602 + ... + 7508.

It is an arithmetic number, because the mean of its divisors is an integer number (514836).

Almost surely, 2^6398885 is an apocalyptic number.

It is an amenable number.

6398885 is a deficient number, since it is larger than the sum of its proper divisors (1838491).

6398885 is a wasteful number, since it uses less digits than its factorization.

6398885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012.

The product of its digits is 414720, while the sum is 47.

The square root of 6398885 is about 2529.6017473112. The cubic root of 6398885 is about 185.6527706942.

The spelling of 6398885 in words is "six million, three hundred ninety-eight thousand, eight hundred eighty-five".