6391280 has 80 divisors (see below), whose sum is σ = 17302464. Its totient is φ = 2150400.

The previous prime is 6391267. The next prime is 6391289. The reversal of 6391280 is 821936.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56504 + ... + 56616.

Almost surely, 2^6391280 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 6391280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8651232).

6391280 is an abundant number, since it is smaller than the sum of its proper divisors (10911184).

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

6391280 is a wasteful number, since it uses less digits than its factorization.

6391280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 6391280 is about 2528.0980993624. The cubic root of 6391280 is about 185.5791928220.

The spelling of 6391280 in words is "six million, three hundred ninety-one thousand, two hundred eighty".