6939128 has 64 divisors (see below), whose sum is σ = 16251840. Its totient is φ = 2709504.

The previous prime is 6939103. The next prime is 6939137. The reversal of 6939128 is 8219396.

It is a junction number, because it is equal to n+sod(n) for n = 6939091 and 6939100.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35126 + ... + 35322.

It is an arithmetic number, because the mean of its divisors is an integer number (253935).

Almost surely, 2^6939128 is an apocalyptic number.

6939128 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6939128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8125920).

6939128 is an abundant number, since it is smaller than the sum of its proper divisors (9312712).

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

6939128 is a wasteful number, since it uses less digits than its factorization.

6939128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 260 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 6939128 is about 2634.2224659280. Note that the first 3 decimals coincide. The cubic root of 6939128 is about 190.7370081853.

The spelling of 6939128 in words is "six million, nine hundred thirty-nine thousand, one hundred twenty-eight".