6387645 has 16 divisors (see below), whose sum is σ = 11149632. Its totient is φ = 3096960.

The previous prime is 6387637. The next prime is 6387649. The reversal of 6387645 is 5467836.

It is not a de Polignac number, because 6387645 - 2³ = 6387637 is a prime.

6387645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6387649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19192 + ... + 19521.

It is an arithmetic number, because the mean of its divisors is an integer number (696852).

Almost surely, 2^6387645 is an apocalyptic number.

It is an amenable number.

6387645 is a deficient number, since it is larger than the sum of its proper divisors (4761987).

6387645 is a wasteful number, since it uses less digits than its factorization.

6387645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38732.

The product of its digits is 120960, while the sum is 39.

The square root of 6387645 is about 2527.3790772260. The cubic root of 6387645 is about 185.5440038200.

The spelling of 6387645 in words is "six million, three hundred eighty-seven thousand, six hundred forty-five".