6439884 has 24 divisors (see below), whose sum is σ = 16392768. Its totient is φ = 1951440.

The previous prime is 6439837. The next prime is 6439903. The reversal of 6439884 is 4889346.

6439884 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×6439884⁴ (a number of 28 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24262 + ... + 24525.

It is an arithmetic number, because the mean of its divisors is an integer number (683032).

Almost surely, 2^6439884 is an apocalyptic number.

It is an amenable number.

6439884 is an abundant number, since it is smaller than the sum of its proper divisors (9952884).

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

6439884 is a wasteful number, since it uses less digits than its factorization.

6439884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48805 (or 48803 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 6439884 is about 2537.6926527852. The cubic root of 6439884 is about 186.0484322946.

The spelling of 6439884 in words is "six million, four hundred thirty-nine thousand, eight hundred eighty-four".