6857390 has 8 divisors (see below), whose sum is σ = 12343320. Its totient is φ = 2742952.

The previous prime is 6857387. The next prime is 6857407. The reversal of 6857390 is 937586.

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

It is a super-2 number, since 2×6857390² = 94047595224200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 342860 + ... + 342879.

It is an arithmetic number, because the mean of its divisors is an integer number (1542915).

Almost surely, 2^6857390 is an apocalyptic number.

6857390 is a deficient number, since it is larger than the sum of its proper divisors (5485930).

6857390 is a wasteful number, since it uses less digits than its factorization.

6857390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685746.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 6857390 is about 2618.6618720255. The cubic root of 6857390 is about 189.9851327240.

The spelling of 6857390 in words is "six million, eight hundred fifty-seven thousand, three hundred ninety".