8386728605 has 4 divisors (see below), whose sum is σ = 10064074332. Its totient is φ = 6709382880.

The previous prime is 8386728593. The next prime is 8386728613. The reversal of 8386728605 is 5068276838.

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 6017570329 + 2369158276 = 77573^2 + 48674^2 .

It is not a de Polignac number, because 8386728605 - 2¹⁶ = 8386663069 is a prime.

It is a Duffinian number.

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, 838672856 + ... + 838672865.

It is an arithmetic number, because the mean of its divisors is an integer number (2516018583).

Almost surely, 2^8386728605 is an apocalyptic number.

It is an amenable number.

8386728605 is a deficient number, since it is larger than the sum of its proper divisors (1677345727).

8386728605 is a wasteful number, since it uses less digits than its factorization.

8386728605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677345726.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The square root of 8386728605 is about 91579.0838838214. The cubic root of 8386728605 is about 2031.7215939748.

The spelling of 8386728605 in words is "eight billion, three hundred eighty-six million, seven hundred twenty-eight thousand, six hundred five".