6440498 has 16 divisors (see below), whose sum is σ = 10116096. Its totient is φ = 3071520.

The previous prime is 6440491. The next prime is 6440513. The reversal of 6440498 is 8940446.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6440491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3815 + ... + 5237.

It is an arithmetic number, because the mean of its divisors is an integer number (632256).

Almost surely, 2^6440498 is an apocalyptic number.

6440498 is a deficient number, since it is larger than the sum of its proper divisors (3675598).

6440498 is a wasteful number, since it uses less digits than its factorization.

6440498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 6440498 is about 2537.8136259387. The cubic root of 6440498 is about 186.0543449325.

The spelling of 6440498 in words is "six million, four hundred forty thousand, four hundred ninety-eight".