6385640 has 32 divisors (see below), whose sum is σ = 14446080. Its totient is φ = 2540352.

The previous prime is 6385619. The next prime is 6385733. The reversal of 6385640 is 465836.

It is a junction number, because it is equal to n+sod(n) for n = 6385597 and 6385606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10217 + ... + 10823.

It is an arithmetic number, because the mean of its divisors is an integer number (451440).

Almost surely, 2^6385640 is an apocalyptic number.

It is an amenable number.

6385640 is an abundant number, since it is smaller than the sum of its proper divisors (8060440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6385640 is a wasteful number, since it uses less digits than its factorization.

6385640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 6385640 is about 2526.9823901246. The cubic root of 6385640 is about 185.5245884926.

The spelling of 6385640 in words is "six million, three hundred eighty-five thousand, six hundred forty".