6939438 has 16 divisors (see below), whose sum is σ = 15140736. Its totient is φ = 2102840.

The previous prime is 6939437. The next prime is 6939467. The reversal of 6939438 is 8349396.

It is a d-powerful number, because it can be written as 6³ + 9 + 3³ + 9⁵ + 4² + 3¹⁴ + 8⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 6939438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6939437) 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 7 ways as a sum of consecutive naturals, for example, 52506 + ... + 52637.

It is an arithmetic number, because the mean of its divisors is an integer number (946296).

Almost surely, 2^6939438 is an apocalyptic number.

6939438 is an abundant number, since it is smaller than the sum of its proper divisors (8201298).

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

6939438 is a wasteful number, since it uses less digits than its factorization.

6939438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105159.

The product of its digits is 139968, while the sum is 42.

The square root of 6939438 is about 2634.2813061630. The cubic root of 6939438 is about 190.7398484841.

Subtracting from 6939438 its sum of digits (42), we obtain a palindrome (6939396).

The spelling of 6939438 in words is "six million, nine hundred thirty-nine thousand, four hundred thirty-eight".