6388945 has 16 divisors (see below), whose sum is σ = 8091648. Its totient is φ = 4835520.

The previous prime is 6388939. The next prime is 6388951. The reversal of 6388945 is 5498836.

6388945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6388939) and next prime (6388951).

It is not a de Polignac number, because 6388945 - 2⁵ = 6388913 is a prime.

It is a d-powerful number, because it can be written as 6³ + 3¹³ + 8⁵ + 8⁵ + 9⁶ + 4¹¹ + 5⁵ .

It is a Duffinian number.

Its product of digits (207360) is a multiple of the sum of its prime divisors (960).

6388945 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6847 + ... + 7723.

It is an arithmetic number, because the mean of its divisors is an integer number (505728).

Almost surely, 2^6388945 is an apocalyptic number.

It is an amenable number.

6388945 is a deficient number, since it is larger than the sum of its proper divisors (1702703).

6388945 is a wasteful number, since it uses less digits than its factorization.

6388945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960.

The product of its digits is 207360, while the sum is 43.

The square root of 6388945 is about 2527.6362475641. The cubic root of 6388945 is about 185.5565901406.

The spelling of 6388945 in words is "six million, three hundred eighty-eight thousand, nine hundred forty-five".