6781836 has 24 divisors (see below), whose sum is σ = 15879024. Its totient is φ = 2252800.

The previous prime is 6781823. The next prime is 6781843. The reversal of 6781836 is 6381876.

6781836 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6781794 and 6781803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3436 + ... + 5036.

It is an arithmetic number, because the mean of its divisors is an integer number (661626).

Almost surely, 2^6781836 is an apocalyptic number.

It is an amenable number.

6781836 is an abundant number, since it is smaller than the sum of its proper divisors (9097188).

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

6781836 is a wasteful number, since it uses less digits than its factorization.

6781836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961 (or 1959 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 6781836 is about 2604.1958451699. The cubic root of 6781836 is about 189.2848089736.

The spelling of 6781836 in words is "six million, seven hundred eighty-one thousand, eight hundred thirty-six".