6221780 has 24 divisors (see below), whose sum is σ = 13186152. Its totient is φ = 2465792.

The previous prime is 6221773. The next prime is 6221819. The reversal of 6221780 is 871226.

It can be written as a sum of positive squares in 4 ways, for example, as 394384 + 5827396 = 628^2 + 2414^2 .

It is a congruent number.

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, 884 + ... + 3636.

It is an arithmetic number, because the mean of its divisors is an integer number (549423).

Almost surely, 2^6221780 is an apocalyptic number.

It is an amenable number.

6221780 is an abundant number, since it is smaller than the sum of its proper divisors (6964372).

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

6221780 is a wasteful number, since it uses less digits than its factorization.

6221780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875 (or 2873 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 6221780 is about 2494.3496146290. The cubic root of 6221780 is about 183.9239209737.

The spelling of 6221780 in words is "six million, two hundred twenty-one thousand, seven hundred eighty".