6442938 has 24 divisors (see below), whose sum is σ = 14695200. Its totient is φ = 2034504.

The previous prime is 6442937. The next prime is 6442939. The reversal of 6442938 is 8392446.

It is a happy number.

6442938 is a `hidden beast` number, since 644 + 2 + 9 + 3 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (6442937) and next prime (6442939).

It is a super-2 number, since 2×6442938² = 83022900143688, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6⁶ + 4² + 4¹⁰ + 2¹⁵ + 9⁶ + 3¹⁴ + 8³ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442937) 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 in 11 ways as a sum of consecutive naturals, for example, 9078 + ... + 9761.

It is an arithmetic number, because the mean of its divisors is an integer number (612300).

Almost surely, 2^6442938 is an apocalyptic number.

6442938 is an abundant number, since it is smaller than the sum of its proper divisors (8252262).

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

6442938 is a wasteful number, since it uses less digits than its factorization.

6442938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18866 (or 18863 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 6442938 is about 2538.2943091769. The cubic root of 6442938 is about 186.0778376958.

The spelling of 6442938 in words is "six million, four hundred forty-two thousand, nine hundred thirty-eight".