6440599 has 8 divisors (see below), whose sum is σ = 7067520. Its totient is φ = 5820600.

The previous prime is 6440587. The next prime is 6440641. The reversal of 6440599 is 9950446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6440599 - 2⁷ = 6440471 is a prime.

It is a Duffinian number.

6440599 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440519) 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 7 ways as a sum of consecutive naturals, for example, 334 + ... + 3604.

It is an arithmetic number, because the mean of its divisors is an integer number (883440).

Almost surely, 2^6440599 is an apocalyptic number.

6440599 is a deficient number, since it is larger than the sum of its proper divisors (626921).

6440599 is a wasteful number, since it uses less digits than its factorization.

6440599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 6440599 is about 2537.8335248790. The cubic root of 6440599 is about 186.0553174966.

The spelling of 6440599 in words is "six million, four hundred forty thousand, five hundred ninety-nine".