8389445 has 8 divisors (see below), whose sum is σ = 10135800. Its totient is φ = 6665920.

The previous prime is 8389441. The next prime is 8389463. The reversal of 8389445 is 5449838.

It can be written as a sum of positive squares in 4 ways, for example, as 1582564 + 6806881 = 1258^2 + 2609^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8389445 - 2² = 8389441 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 8² + 3 + 8² + 9² + 4¹¹ + 4¹¹ + 5⁴ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8389441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4886 + ... + 6375.

It is an arithmetic number, because the mean of its divisors is an integer number (1266975).

Almost surely, 2^8389445 is an apocalyptic number.

It is an amenable number.

8389445 is a deficient number, since it is larger than the sum of its proper divisors (1746355).

8389445 is a wasteful number, since it uses less digits than its factorization.

8389445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11415.

The product of its digits is 138240, while the sum is 41.

The square root of 8389445 is about 2896.4538663683. The cubic root of 8389445 is about 203.1940923143.

The spelling of 8389445 in words is "eight million, three hundred eighty-nine thousand, four hundred forty-five".