6857889 has 8 divisors (see below), whose sum is σ = 9184032. Its totient is φ = 4551840.

The previous prime is 6857881. The next prime is 6857927. The reversal of 6857889 is 9887586.

It is a happy number.

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

It is not a de Polignac number, because 6857889 - 2³ = 6857881 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 8² + 5⁸ + 7 + 8³ + 8⁴ + 9⁷ .

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (6857881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4207 + ... + 5604.

It is an arithmetic number, because the mean of its divisors is an integer number (1148004).

Almost surely, 2^6857889 is an apocalyptic number.

It is an amenable number.

6857889 is a deficient number, since it is larger than the sum of its proper divisors (2326143).

6857889 is a wasteful number, since it uses less digits than its factorization.

6857889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10047.

The product of its digits is 967680, while the sum is 51.

The square root of 6857889 is about 2618.7571479616. The cubic root of 6857889 is about 189.9897409050.

The spelling of 6857889 in words is "six million, eight hundred fifty-seven thousand, eight hundred eighty-nine".