8638345 has 4 divisors (see below), whose sum is σ = 10366020. Its totient is φ = 6910672.

The previous prime is 8638339. The next prime is 8638349. The reversal of 8638345 is 5438368.

8638345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1108809 + 7529536 = 1053^2 + 2744^2 .

It is a cyclic number.

It is not a de Polignac number, because 8638345 - 2³ = 8638337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8638349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863830 + ... + 863839.

It is an arithmetic number, because the mean of its divisors is an integer number (2591505).

Almost surely, 2^8638345 is an apocalyptic number.

It is an amenable number.

8638345 is a deficient number, since it is larger than the sum of its proper divisors (1727675).

8638345 is a wasteful number, since it uses less digits than its factorization.

8638345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727674.

The product of its digits is 69120, while the sum is 37.

The square root of 8638345 is about 2939.1061566401. The cubic root of 8638345 is about 205.1840108655.

The spelling of 8638345 in words is "eight million, six hundred thirty-eight thousand, three hundred forty-five".