8643604 has 12 divisors (see below), whose sum is σ = 15237684. Its totient is φ = 4289984.

The previous prime is 8643589. The next prime is 8643619. The reversal of 8643604 is 4063468.

It is an interprime number because it is at equal distance from previous prime (8643589) and next prime (8643619).

It can be written as a sum of positive squares in 2 ways, for example, as 5071504 + 3572100 = 2252^2 + 1890^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7339 + ... + 8434.

It is an arithmetic number, because the mean of its divisors is an integer number (1269807).

Almost surely, 2^8643604 is an apocalyptic number.

It is an amenable number.

8643604 is a deficient number, since it is larger than the sum of its proper divisors (6594080).

8643604 is a wasteful number, since it uses less digits than its factorization.

8643604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15914 (or 15912 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 8643604 is about 2940.0006802720. Note that the first 3 decimals coincide. The cubic root of 8643604 is about 205.2256409004.

The spelling of 8643604 in words is "eight million, six hundred forty-three thousand, six hundred four".