6905128 has 16 divisors (see below), whose sum is σ = 13708980. Its totient is φ = 3249408.

The previous prime is 6905123. The next prime is 6905137. The reversal of 6905128 is 8215096.

It can be written as a sum of positive squares in 2 ways, for example, as 6360484 + 544644 = 2522^2 + 738^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6905128.

It is not an unprimeable number, because it can be changed into a prime (6905123) by changing a digit.

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, 25251 + ... + 25522.

Almost surely, 2^6905128 is an apocalyptic number.

6905128 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6905128 is a deficient number, since it is larger than the sum of its proper divisors (6803852).

6905128 is a wasteful number, since it uses less digits than its factorization.

6905128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50796 (or 50792 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 6905128 is about 2627.7610241420. The cubic root of 6905128 is about 190.4249767154.

The spelling of 6905128 in words is "six million, nine hundred five thousand, one hundred twenty-eight".