6509838 has 16 divisors (see below), whose sum is σ = 13044816. Its totient is φ = 2165760.

The previous prime is 6509821. The next prime is 6509843. The reversal of 6509838 is 8389056.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6509796 and 6509805.

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 7 ways as a sum of consecutive naturals, for example, 5070 + ... + 6222.

It is an arithmetic number, because the mean of its divisors is an integer number (815301).

Almost surely, 2^6509838 is an apocalyptic number.

6509838 is an abundant number, since it is smaller than the sum of its proper divisors (6534978).

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

6509838 is a wasteful number, since it uses less digits than its factorization.

6509838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 6509838 is about 2551.4384178341. The cubic root of 6509838 is about 186.7196653649.

The spelling of 6509838 in words is "six million, five hundred nine thousand, eight hundred thirty-eight".