6813780 has 96 divisors (see below), whose sum is σ = 20697600. Its totient is φ = 1669248.

The previous prime is 6813739. The next prime is 6813797. The reversal of 6813780 is 873186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48951 + ... + 49089.

It is an arithmetic number, because the mean of its divisors is an integer number (215600).

Almost surely, 2^6813780 is an apocalyptic number.

6813780 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 6813780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10348800).

6813780 is an abundant number, since it is smaller than the sum of its proper divisors (13883820).

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

6813780 is a wasteful number, since it uses less digits than its factorization.

6813780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 6813780 is about 2610.3218192399. The cubic root of 6813780 is about 189.5815351706.

The spelling of 6813780 in words is "six million, eight hundred thirteen thousand, seven hundred eighty".