6499878 has 48 divisors (see below), whose sum is σ = 16343040. Its totient is φ = 1686960.

The previous prime is 6499861. The next prime is 6499879. The reversal of 6499878 is 8789946.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6499878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499879) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4443 + ... + 5721.

It is an arithmetic number, because the mean of its divisors is an integer number (340480).

Almost surely, 2^6499878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6499878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8171520).

6499878 is an abundant number, since it is smaller than the sum of its proper divisors (9843162).

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

6499878 is a wasteful number, since it uses less digits than its factorization.

6499878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313 (or 1302 counting only the distinct ones).

The product of its digits is 870912, while the sum is 51.

The square root of 6499878 is about 2549.4858305156. The cubic root of 6499878 is about 186.6243902275.

The spelling of 6499878 in words is "six million, four hundred ninety-nine thousand, eight hundred seventy-eight".