6491904 has 72 divisors (see below), whose sum is σ = 17660160. Its totient is φ = 2116608.

The previous prime is 6491897. The next prime is 6491923. The reversal of 6491904 is 4091946.

It is an Ulam number.

It is a zygodrome in base 2.

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, 60619 + ... + 60725.

It is an arithmetic number, because the mean of its divisors is an integer number (245280).

Almost surely, 2^6491904 is an apocalyptic number.

6491904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6491904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8830080).

6491904 is an abundant number, since it is smaller than the sum of its proper divisors (11168256).

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

6491904 is a wasteful number, since it uses less digits than its factorization.

6491904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 6491904 is about 2547.9215058553. The cubic root of 6491904 is about 186.5480425458.

The spelling of 6491904 in words is "six million, four hundred ninety-one thousand, nine hundred four".