6783540 has 48 divisors (see below), whose sum is σ = 19135872. Its totient is φ = 1795456.

The previous prime is 6783533. The next prime is 6783583. The reversal of 6783540 is 453876.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9682 + ... + 10358.

It is an arithmetic number, because the mean of its divisors is an integer number (398664).

Almost surely, 2^6783540 is an apocalyptic number.

6783540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6783540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9567936).

6783540 is an abundant number, since it is smaller than the sum of its proper divisors (12352332).

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

6783540 is a wasteful number, since it uses less digits than its factorization.

6783540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 6783540 is about 2604.5229889559. The cubic root of 6783540 is about 189.3006608415.

The spelling of 6783540 in words is "six million, seven hundred eighty-three thousand, five hundred forty".