6491968 has 56 divisors (see below), whose sum is σ = 15109952. Its totient is φ = 2709504.

The previous prime is 6491951. The next prime is 6491971. The reversal of 6491968 is 8691946.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

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, 19096 + ... + 19432.

Almost surely, 2^6491968 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 6491968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7554976).

6491968 is an abundant number, since it is smaller than the sum of its proper divisors (8617984).

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

6491968 is a wasteful number, since it uses less digits than its factorization.

6491968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 389 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 6491968 is about 2547.9340650810. The cubic root of 6491968 is about 186.5486555676.

The spelling of 6491968 in words is "six million, four hundred ninety-one thousand, nine hundred sixty-eight".