8638605 has 12 divisors (see below), whose sum is σ = 14973660. Its totient is φ = 4607232.

The previous prime is 8638583. The next prime is 8638621. The reversal of 8638605 is 5068368.

It can be written as a sum of positive squares in 2 ways, for example, as 1397124 + 7241481 = 1182^2 + 2691^2 .

It is not a de Polignac number, because 8638605 - 2⁷ = 8638477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8638605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95940 + ... + 96029.

It is an arithmetic number, because the mean of its divisors is an integer number (1247805).

Almost surely, 2^8638605 is an apocalyptic number.

It is an amenable number.

8638605 is a deficient number, since it is larger than the sum of its proper divisors (6335055).

8638605 is a wasteful number, since it uses less digits than its factorization.

8638605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191980 (or 191977 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 8638605 is about 2939.1503874419. The cubic root of 8638605 is about 205.1860694121.

The spelling of 8638605 in words is "eight million, six hundred thirty-eight thousand, six hundred five".