6447984 has 20 divisors (see below), whose sum is σ = 16657416. Its totient is φ = 2149312.

The previous prime is 6447983. The next prime is 6447989. The reversal of 6447984 is 4897446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6447983) 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, 67119 + ... + 67214.

Almost surely, 2^6447984 is an apocalyptic number.

It is an amenable number.

6447984 is an abundant number, since it is smaller than the sum of its proper divisors (10209432).

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

6447984 is a wasteful number, since it uses less digits than its factorization.

6447984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134344 (or 134338 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 6447984 is about 2539.2880892093. The cubic root of 6447984 is about 186.1264026906.

The spelling of 6447984 in words is "six million, four hundred forty-seven thousand, nine hundred eighty-four".