6821338 has 8 divisors (see below), whose sum is σ = 10333620. Its totient is φ = 3376800.

The previous prime is 6821303. The next prime is 6821383. The reversal of 6821338 is 8331286.

It can be written as a sum of positive squares in 2 ways, for example, as 5349969 + 1471369 = 2313^2 + 1213^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6821338² = 93061304220488, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16683 + ... + 17086.

Almost surely, 2^6821338 is an apocalyptic number.

6821338 is a deficient number, since it is larger than the sum of its proper divisors (3512282).

6821338 is a wasteful number, since it uses less digits than its factorization.

6821338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33872.

The product of its digits is 6912, while the sum is 31.

The square root of 6821338 is about 2611.7691322167. The cubic root of 6821338 is about 189.6516053217.

The spelling of 6821338 in words is "six million, eight hundred twenty-one thousand, three hundred thirty-eight".