6489940 has 12 divisors (see below), whose sum is σ = 13628916. Its totient is φ = 2595968.

The previous prime is 6489913. The next prime is 6489949. The reversal of 6489940 is 499846.

It can be written as a sum of positive squares in 2 ways, for example, as 3378244 + 3111696 = 1838^2 + 1764^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6489893 and 6489902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6489949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162229 + ... + 162268.

It is an arithmetic number, because the mean of its divisors is an integer number (1135743).

Almost surely, 2^6489940 is an apocalyptic number.

It is an amenable number.

6489940 is an abundant number, since it is smaller than the sum of its proper divisors (7138976).

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

6489940 is a wasteful number, since it uses less digits than its factorization.

6489940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324506 (or 324504 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 6489940 is about 2547.5360645141. The cubic root of 6489940 is about 186.5292284809.

The spelling of 6489940 in words is "six million, four hundred eighty-nine thousand, nine hundred forty".