6549220 has 24 divisors (see below), whose sum is σ = 13810104. Its totient is φ = 2608896.

The previous prime is 6549197. The next prime is 6549223. The reversal of 6549220 is 229456.

It can be written as a sum of positive squares in 4 ways, for example, as 760384 + 5788836 = 872^2 + 2406^2 .

It is not an unprimeable number, because it can be changed into a prime (6549223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5824 + ... + 6856.

It is an arithmetic number, because the mean of its divisors is an integer number (575421).

Almost surely, 2^6549220 is an apocalyptic number.

It is an amenable number.

6549220 is an abundant number, since it is smaller than the sum of its proper divisors (7260884).

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

6549220 is a wasteful number, since it uses less digits than its factorization.

6549220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 6549220 is about 2559.1443882673. The cubic root of 6549220 is about 187.0954358579.

The spelling of 6549220 in words is "six million, five hundred forty-nine thousand, two hundred twenty".