6857830 has 24 divisors (see below), whose sum is σ = 14152752. Its totient is φ = 2343744.

The previous prime is 6857821. The next prime is 6857831. The reversal of 6857830 is 387586.

It is a self number, because there is not a number n which added to its sum of digits gives 6857830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857831) 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, 21754 + ... + 22066.

It is an arithmetic number, because the mean of its divisors is an integer number (589698).

Almost surely, 2^6857830 is an apocalyptic number.

6857830 is an abundant number, since it is smaller than the sum of its proper divisors (7294922).

6857830 is an equidigital number, since it uses as much as digits as its factorization.

6857830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 6857830 is about 2618.7458830517. The cubic root of 6857830 is about 189.9891960616.

Multiplying 6857830 by its product of nonzero digits (40320), we get a square (276507705600 = 525840²).

It can be divided in two parts, 685 and 7830, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 6857830 in words is "six million, eight hundred fifty-seven thousand, eight hundred thirty".