6840818 has 4 divisors (see below), whose sum is σ = 10261230. Its totient is φ = 3420408.

The previous prime is 6840811. The next prime is 6840857. The reversal of 6840818 is 8180486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8180486 = 2 ⋅4090243.

It can be written as a sum of positive squares in only one way, i.e., 3892729 + 2948089 = 1973^2 + 1717^2 .

It is not an unprimeable number, because it can be changed into a prime (6840811) 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 as a sum of consecutive naturals, namely, 1710203 + ... + 1710206.

Almost surely, 2^6840818 is an apocalyptic number.

6840818 is a deficient number, since it is larger than the sum of its proper divisors (3420412).

6840818 is a wasteful number, since it uses less digits than its factorization.

6840818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420411.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 6840818 is about 2615.4957465077. The cubic root of 6840818 is about 189.8319659330.

The spelling of 6840818 in words is "six million, eight hundred forty thousand, eight hundred eighteen".