6390445 has 8 divisors (see below), whose sum is σ = 7847136. Its totient is φ = 4993296.

The previous prime is 6390443. The next prime is 6390463. The reversal of 6390445 is 5440936.

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 6390445 - 2¹ = 6390443 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390443) 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, 14647 + ... + 15076.

It is an arithmetic number, because the mean of its divisors is an integer number (980892).

Almost surely, 2^6390445 is an apocalyptic number.

It is an amenable number.

6390445 is a deficient number, since it is larger than the sum of its proper divisors (1456691).

6390445 is a wasteful number, since it uses less digits than its factorization.

6390445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29771.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 6390445 is about 2527.9329500602. The cubic root of 6390445 is about 185.5711106969.

The spelling of 6390445 in words is "six million, three hundred ninety thousand, four hundred forty-five".