28648657386 has 24 divisors (see below), whose sum is σ = 62127704964. Its totient is φ = 9540996480.

The previous prime is 28648657343. The next prime is 28648657391. The reversal of 28648657386 is 68375684682.

28648657386 is a `hidden beast` number, since 2 + 8 + 6 + 486 + 5 + 73 + 86 = 666.

28648657386 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 28605295161 + 43362225 = 169131^2 + 6585^2 .

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, 692335 + ... + 732546.

Almost surely, 2^28648657386 is an apocalyptic number.

28648657386 is an abundant number, since it is smaller than the sum of its proper divisors (33479047578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28648657386 is a wasteful number, since it uses less digits than its factorization.

28648657386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426006 (or 1426003 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 63.

The spelling of 28648657386 in words is "twenty-eight billion, six hundred forty-eight million, six hundred fifty-seven thousand, three hundred eighty-six".