6405338 has 4 divisors (see below), whose sum is σ = 9608010. Its totient is φ = 3202668.

The previous prime is 6405331. The next prime is 6405353. The reversal of 6405338 is 8335046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8335046 = 2 ⋅4167523.

It can be written as a sum of positive squares in only one way, i.e., 6017209 + 388129 = 2453^2 + 623^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6405338.

It is not an unprimeable number, because it can be changed into a prime (6405331) by changing a digit.

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 as a sum of consecutive naturals, namely, 1601333 + ... + 1601336.

Almost surely, 2^6405338 is an apocalyptic number.

6405338 is a deficient number, since it is larger than the sum of its proper divisors (3202672).

6405338 is a wasteful number, since it uses less digits than its factorization.

6405338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3202671.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 6405338 is about 2530.8769231237. The cubic root of 6405338 is about 185.7151573360.

The spelling of 6405338 in words is "six million, four hundred five thousand, three hundred thirty-eight".