6851864 has 8 divisors (see below), whose sum is σ = 12847260. Its totient is φ = 3425928.

The previous prime is 6851863. The next prime is 6851963. The reversal of 6851864 is 4681586.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6851863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428234 + ... + 428249.

Almost surely, 2^6851864 is an apocalyptic number.

It is an amenable number.

6851864 is a deficient number, since it is larger than the sum of its proper divisors (5995396).

6851864 is a wasteful number, since it uses less digits than its factorization.

6851864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856489 (or 856485 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 6851864 is about 2617.6065403341. The cubic root of 6851864 is about 189.9340860927.

The spelling of 6851864 in words is "six million, eight hundred fifty-one thousand, eight hundred sixty-four".