6538240 has 44 divisors (see below), whose sum is σ = 15696396. Its totient is φ = 2613248.

The previous prime is 6538219. The next prime is 6538267. The reversal of 6538240 is 428356.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 3211264 = 1824^2 + 1792^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6538199 and 6538208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4482 + ... + 5758.

Almost surely, 2^6538240 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 6538240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7848198).

6538240 is an abundant number, since it is smaller than the sum of its proper divisors (9158156).

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

6538240 is a wasteful number, since it uses less digits than its factorization.

6538240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 6538240 is about 2556.9982401245. The cubic root of 6538240 is about 186.9908199903.

The spelling of 6538240 in words is "six million, five hundred thirty-eight thousand, two hundred forty".