6864040 has 32 divisors (see below), whose sum is σ = 15556680. Its totient is φ = 2725632.

The previous prime is 6864031. The next prime is 6864043. The reversal of 6864040 is 404686.

It can be written as a sum of positive squares in 4 ways, for example, as 6482116 + 381924 = 2546^2 + 618^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6864043) 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 7 ways as a sum of consecutive naturals, for example, 5734 + ... + 6826.

Almost surely, 2^6864040 is an apocalyptic number.

It is an amenable number.

6864040 is an abundant number, since it is smaller than the sum of its proper divisors (8692640).

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

6864040 is a wasteful number, since it uses less digits than its factorization.

6864040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 6864040 is about 2619.9312968091. The cubic root of 6864040 is about 190.0465260022.

The spelling of 6864040 in words is "six million, eight hundred sixty-four thousand, forty".