6855820 has 12 divisors (see below), whose sum is σ = 14397264. Its totient is φ = 2742320.

The previous prime is 6855809. The next prime is 6855829. The reversal of 6855820 is 285586.

It is not an unprimeable number, because it can be changed into a prime (6855829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171376 + ... + 171415.

It is an arithmetic number, because the mean of its divisors is an integer number (1199772).

Almost surely, 2^6855820 is an apocalyptic number.

It is an amenable number.

6855820 is an abundant number, since it is smaller than the sum of its proper divisors (7541444).

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

6855820 is a wasteful number, since it uses less digits than its factorization.

6855820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342800 (or 342798 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 6855820 is about 2618.3620834407. The cubic root of 6855820 is about 189.9706325802.

The spelling of 6855820 in words is "six million, eight hundred fifty-five thousand, eight hundred twenty".