6891738 has 16 divisors (see below), whose sum is σ = 15752640. Its totient is φ = 1969056.

The previous prime is 6891733. The next prime is 6891769. The reversal of 6891738 is 8371986.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 164089 = 6891738 / (6 + 8 + 9 + 1 + 7 + 3 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 6891738.

It is not an unprimeable number, because it can be changed into a prime (6891733) 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 7 ways as a sum of consecutive naturals, for example, 82003 + ... + 82086.

It is an arithmetic number, because the mean of its divisors is an integer number (984540).

Almost surely, 2^6891738 is an apocalyptic number.

6891738 is an abundant number, since it is smaller than the sum of its proper divisors (8860902).

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

6891738 is a wasteful number, since it uses less digits than its factorization.

6891738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164101.

The product of its digits is 72576, while the sum is 42.

The square root of 6891738 is about 2625.2119914399. The cubic root of 6891738 is about 190.3018102634.

It can be divided in two parts, 68 and 91738, that added together give a triangular number (91806 = T₄₂₈).

The spelling of 6891738 in words is "six million, eight hundred ninety-one thousand, seven hundred thirty-eight".