6399488 has 40 divisors (see below), whose sum is σ = 13258080. Its totient is φ = 3082240.

The previous prime is 6399467. The next prime is 6399509. The reversal of 6399488 is 8849936.

It is an interprime number because it is at equal distance from previous prime (6399467) and next prime (6399509).

It is a congruent number.

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, 14633 + ... + 15063.

It is an arithmetic number, because the mean of its divisors is an integer number (331452).

Almost surely, 2^6399488 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 6399488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6629040).

6399488 is an abundant number, since it is smaller than the sum of its proper divisors (6858592).

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

6399488 is an equidigital number, since it uses as much as digits as its factorization.

6399488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 462 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 6399488 is about 2529.7209332256. The cubic root of 6399488 is about 185.6586021844.

The spelling of 6399488 in words is "six million, three hundred ninety-nine thousand, four hundred eighty-eight".