6447240 has 48 divisors (see below), whose sum is σ = 20954700. Its totient is φ = 1719168.

The previous prime is 6447239. The next prime is 6447253. The reversal of 6447240 is 427446.

It can be written as a sum of positive squares in 2 ways, for example, as 6380676 + 66564 = 2526^2 + 258^2 .

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 11 ways as a sum of consecutive naturals, for example, 8595 + ... + 9314.

Almost surely, 2^6447240 is an apocalyptic number.

6447240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6447240 is an abundant number, since it is smaller than the sum of its proper divisors (14507460).

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

6447240 is a wasteful number, since it uses less digits than its factorization.

6447240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17926 (or 17919 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 6447240 is about 2539.1415872298. The cubic root of 6447240 is about 186.1192436897.

The spelling of 6447240 in words is "six million, four hundred forty-seven thousand, two hundred forty".