6491380 has 48 divisors (see below), whose sum is σ = 15724800. Its totient is φ = 2204928.

The previous prime is 6491377. The next prime is 6491411. The reversal of 6491380 is 831946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27744 + ... + 27976.

It is an arithmetic number, because the mean of its divisors is an integer number (327600).

Almost surely, 2^6491380 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 6491380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7862400).

6491380 is an abundant number, since it is smaller than the sum of its proper divisors (9233420).

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

6491380 is a wasteful number, since it uses less digits than its factorization.

6491380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 6491380 is about 2547.8186748668. The cubic root of 6491380 is about 186.5430232785.

The spelling of 6491380 in words is "six million, four hundred ninety-one thousand, three hundred eighty".