6857442 has 24 divisors (see below), whose sum is σ = 15640560. Its totient is φ = 2165400.

The previous prime is 6857429. The next prime is 6857449. The reversal of 6857442 is 2447586.

It is a d-powerful number, because it can be written as 6⁶ + 8⁶ + 5⁸ + 7⁸ + 4⁸ + 4⁸ + 2¹⁸ .

It is a junction number, because it is equal to n+sod(n) for n = 6857397 and 6857406.

It is not an unprimeable number, because it can be changed into a prime (6857449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9684 + ... + 10367.

It is an arithmetic number, because the mean of its divisors is an integer number (651690).

Almost surely, 2^6857442 is an apocalyptic number.

6857442 is an abundant number, since it is smaller than the sum of its proper divisors (8783118).

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

6857442 is a wasteful number, since it uses less digits than its factorization.

6857442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20078 (or 20075 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 6857442 is about 2618.6718007417. The cubic root of 6857442 is about 189.9856129457.

The spelling of 6857442 in words is "six million, eight hundred fifty-seven thousand, four hundred forty-two".