28408357605 has 16 divisors (see below), whose sum is σ = 45455535360. Its totient is φ = 15150403008.

The previous prime is 28408357543. The next prime is 28408357643. The reversal of 28408357605 is 50675380482.

It is not a de Polignac number, because 28408357605 - 2¹¹ = 28408355557 is a prime.

It is a super-2 number, since 2×28408357605² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471999 + ... + 528771.

It is an arithmetic number, because the mean of its divisors is an integer number (2840970960).

Almost surely, 2^28408357605 is an apocalyptic number.

It is an amenable number.

28408357605 is a deficient number, since it is larger than the sum of its proper divisors (17047177755).

28408357605 is a wasteful number, since it uses less digits than its factorization.

28408357605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90140.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 28408357605 in words is "twenty-eight billion, four hundred eight million, three hundred fifty-seven thousand, six hundred five".