6549940 has 48 divisors (see below), whose sum is σ = 14878080. Its totient is φ = 2414720.

The previous prime is 6549937. The next prime is 6549973. The reversal of 6549940 is 499456.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6549940.

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 15 ways as a sum of consecutive naturals, for example, 13095 + ... + 13585.

It is an arithmetic number, because the mean of its divisors is an integer number (309960).

Almost surely, 2^6549940 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 6549940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7439040).

6549940 is an abundant number, since it is smaller than the sum of its proper divisors (8328140).

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

6549940 is a wasteful number, since it uses less digits than its factorization.

6549940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 6549940 is about 2559.2850564171. The cubic root of 6549940 is about 187.1022918284.

It can be divided in two parts, 65 and 49940, that added together give a palindrome (50005).

The spelling of 6549940 in words is "six million, five hundred forty-nine thousand, nine hundred forty".