6865864 has 8 divisors (see below), whose sum is σ = 12873510. Its totient is φ = 3432928.

The previous prime is 6865861. The next prime is 6865867. The reversal of 6865864 is 4685686.

It is an interprime number because it is at equal distance from previous prime (6865861) and next prime (6865867).

It can be written as a sum of positive squares in only one way, i.e., 5963364 + 902500 = 2442^2 + 950^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 6865864.

It is not an unprimeable number, because it can be changed into a prime (6865861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429109 + ... + 429124.

Almost surely, 2^6865864 is an apocalyptic number.

It is an amenable number.

6865864 is a deficient number, since it is larger than the sum of its proper divisors (6007646).

6865864 is a wasteful number, since it uses less digits than its factorization.

6865864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858239 (or 858235 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 6865864 is about 2620.2793744179. The cubic root of 6865864 is about 190.0633583712.

The spelling of 6865864 in words is "six million, eight hundred sixty-five thousand, eight hundred sixty-four".