6397138 has 16 divisors (see below), whose sum is σ = 10575360. Its totient is φ = 2878000.

The previous prime is 6397133. The next prime is 6397147. The reversal of 6397138 is 8317936.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6397097 and 6397106.

It is not an unprimeable number, because it can be changed into a prime (6397133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783 + ... + 3661.

It is an arithmetic number, because the mean of its divisors is an integer number (660960).

Almost surely, 2^6397138 is an apocalyptic number.

6397138 is a deficient number, since it is larger than the sum of its proper divisors (4178222).

6397138 is a wasteful number, since it uses less digits than its factorization.

6397138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993.

The product of its digits is 27216, while the sum is 37.

The square root of 6397138 is about 2529.2564124659. The cubic root of 6397138 is about 185.6358737447.

It can be divided in two parts, 63971 and 38, that added together give a square (64009 = 253²).

The spelling of 6397138 in words is "six million, three hundred ninety-seven thousand, one hundred thirty-eight".