6440627 has 4 divisors (see below), whose sum is σ = 6614736. Its totient is φ = 6266520.

The previous prime is 6440587. The next prime is 6440641. The reversal of 6440627 is 7260446.

6440627 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7260446 = 2 ⋅3630223.

It is a cyclic number.

It is not a de Polignac number, because 6440627 - 2¹² = 6436531 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6440627.

It is not an unprimeable number, because it can be changed into a prime (6440647) 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 3 ways as a sum of consecutive naturals, for example, 86999 + ... + 87072.

It is an arithmetic number, because the mean of its divisors is an integer number (1653684).

Almost surely, 2^6440627 is an apocalyptic number.

6440627 is a deficient number, since it is larger than the sum of its proper divisors (174109).

6440627 is a wasteful number, since it uses less digits than its factorization.

6440627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174108.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 6440627 is about 2537.8390413893. The cubic root of 6440627 is about 186.0555871165.

The spelling of 6440627 in words is "six million, four hundred forty thousand, six hundred twenty-seven".