6440774 has 8 divisors (see below), whose sum is σ = 9747000. Its totient is φ = 3191776.

The previous prime is 6440771. The next prime is 6440779. The reversal of 6440774 is 4770446.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6440774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14024 + ... + 14475.

It is an arithmetic number, because the mean of its divisors is an integer number (1218375).

Almost surely, 2^6440774 is an apocalyptic number.

6440774 is a deficient number, since it is larger than the sum of its proper divisors (3306226).

6440774 is a wasteful number, since it uses less digits than its factorization.

6440774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28614.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 6440774 is about 2537.8680028717. The cubic root of 6440774 is about 186.0570026083.

The spelling of 6440774 in words is "six million, four hundred forty thousand, seven hundred seventy-four".