6539040 has 144 divisors (see below), whose sum is σ = 23587200. Its totient is φ = 1645056.

The previous prime is 6539023. The next prime is 6539041. The reversal of 6539040 is 409356.

It is a happy number.

6539040 is a `hidden beast` number, since 653 + 9 + 0 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 6538995 and 6539013.

It is not an unprimeable number, because it can be changed into a prime (6539041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27241 + ... + 27479.

It is an arithmetic number, because the mean of its divisors is an integer number (163800).

Almost surely, 2^6539040 is an apocalyptic number.

6539040 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 6539040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11793600).

6539040 is an abundant number, since it is smaller than the sum of its proper divisors (17048160).

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

6539040 is a wasteful number, since it uses less digits than its factorization.

6539040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 6539040 is about 2557.1546687676. The cubic root of 6539040 is about 186.9984462300.

The spelling of 6539040 in words is "six million, five hundred thirty-nine thousand, forty".