6889645 has 24 divisors (see below), whose sum is σ = 9796248. Its totient is φ = 4636800.

The previous prime is 6889643. The next prime is 6889661. The reversal of 6889645 is 5469886.

It can be written as a sum of positive squares in 4 ways, for example, as 35721 + 6853924 = 189^2 + 2618^2 .

It is not a de Polignac number, because 6889645 - 2¹ = 6889643 is a prime.

It is a super-3 number, since 3×6889645³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6889595 and 6889604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6889643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14715 + ... + 15175.

It is an arithmetic number, because the mean of its divisors is an integer number (408177).

Almost surely, 2^6889645 is an apocalyptic number.

It is an amenable number.

6889645 is a deficient number, since it is larger than the sum of its proper divisors (2906603).

6889645 is a wasteful number, since it uses less digits than its factorization.

6889645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 534 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 6889645 is about 2624.8133266958. The cubic root of 6889645 is about 190.2825436180.

The spelling of 6889645 in words is "six million, eight hundred eighty-nine thousand, six hundred forty-five".