6871820 has 12 divisors (see below), whose sum is σ = 14430864. Its totient is φ = 2748720.

The previous prime is 6871807. The next prime is 6871829. The reversal of 6871820 is 281786.

It is a super-2 number, since 2×6871820² = 94443820224800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6871829) by changing a digit.

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, 171776 + ... + 171815.

It is an arithmetic number, because the mean of its divisors is an integer number (1202572).

Almost surely, 2^6871820 is an apocalyptic number.

It is an amenable number.

6871820 is an abundant number, since it is smaller than the sum of its proper divisors (7559044).

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

6871820 is a wasteful number, since it uses less digits than its factorization.

6871820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343600 (or 343598 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 6871820 is about 2621.4156480803. The cubic root of 6871820 is about 190.1183012105.

The spelling of 6871820 in words is "six million, eight hundred seventy-one thousand, eight hundred twenty".