6440027 has 8 divisors (see below), whose sum is σ = 7145280. Its totient is φ = 5754760.

The previous prime is 6440011. The next prime is 6440029. The reversal of 6440027 is 7200446.

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

It is not a de Polignac number, because 6440027 - 2⁴ = 6440011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6439984 and 6440011.

It is not an unprimeable number, because it can be changed into a prime (6440029) 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, 4313 + ... + 5610.

It is an arithmetic number, because the mean of its divisors is an integer number (893160).

Almost surely, 2^6440027 is an apocalyptic number.

6440027 is a deficient number, since it is larger than the sum of its proper divisors (705253).

6440027 is a wasteful number, since it uses less digits than its factorization.

6440027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9993.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 6440027 is about 2537.7208278296. The cubic root of 6440027 is about 186.0498093758.

The spelling of 6440027 in words is "six million, four hundred forty thousand, twenty-seven".