8387645 has 16 divisors (see below), whose sum is σ = 12109440. Its totient is φ = 5448384.

The previous prime is 8387611. The next prime is 8387671. The reversal of 8387645 is 5467838.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 8387645 - 2⁶ = 8387581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5642 + ... + 6971.

It is an arithmetic number, because the mean of its divisors is an integer number (756840).

Almost surely, 2^8387645 is an apocalyptic number.

It is an amenable number.

8387645 is a deficient number, since it is larger than the sum of its proper divisors (3721795).

8387645 is a wasteful number, since it uses less digits than its factorization.

8387645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12644.

The product of its digits is 161280, while the sum is 41.

The square root of 8387645 is about 2896.1431249163. The cubic root of 8387645 is about 203.1795591509.

The spelling of 8387645 in words is "eight million, three hundred eighty-seven thousand, six hundred forty-five".