6781456 has 40 divisors (see below), whose sum is σ = 14624064. Its totient is φ = 3020160.

The previous prime is 6781433. The next prime is 6781457. The reversal of 6781456 is 6541876.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6781457) 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, 8965 + ... + 9691.

Almost surely, 2^6781456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6781456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7312032).

6781456 is an abundant number, since it is smaller than the sum of its proper divisors (7842608).

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

6781456 is a wasteful number, since it uses less digits than its factorization.

6781456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 793 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 6781456 is about 2604.1228849653. The cubic root of 6781456 is about 189.2812735706.

The spelling of 6781456 in words is "six million, seven hundred eighty-one thousand, four hundred fifty-six".