6390880 has 48 divisors (see below), whose sum is σ = 15377040. Its totient is φ = 2509312.

The previous prime is 6390871. The next prime is 6390883. The reversal of 6390880 is 880936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390883) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9102 + ... + 9778.

It is an arithmetic number, because the mean of its divisors is an integer number (320355).

Almost surely, 2^6390880 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 6390880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7688520).

6390880 is an abundant number, since it is smaller than the sum of its proper divisors (8986160).

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

6390880 is a wasteful number, since it uses less digits than its factorization.

6390880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6390880 is about 2528.0189872705. The cubic root of 6390880 is about 185.5753212331.

The spelling of 6390880 in words is "six million, three hundred ninety thousand, eight hundred eighty".