6440617 has 8 divisors (see below), whose sum is σ = 6598080. Its totient is φ = 6284880.

The previous prime is 6440587. The next prime is 6440641. The reversal of 6440617 is 7160446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6440617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6440647) 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, 9892 + ... + 10522.

It is an arithmetic number, because the mean of its divisors is an integer number (824760).

Almost surely, 2^6440617 is an apocalyptic number.

It is an amenable number.

6440617 is a deficient number, since it is larger than the sum of its proper divisors (157463).

6440617 is a wasteful number, since it uses less digits than its factorization.

6440617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 6440617 is about 2537.8370712085. The cubic root of 6440617 is about 186.0554908238.

The spelling of 6440617 in words is "six million, four hundred forty thousand, six hundred seventeen".