28605584138 has 16 divisors (see below), whose sum is σ = 42968076480. Its totient is φ = 14282908800.

The previous prime is 28605584107. The next prime is 28605584171. The reversal of 28605584138 is 83148550682.

28605584138 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5706053 + ... + 5711063.

It is an arithmetic number, because the mean of its divisors is an integer number (2685504780).

Almost surely, 2^28605584138 is an apocalyptic number.

28605584138 is a deficient number, since it is larger than the sum of its proper divisors (14362492342).

28605584138 is a wasteful number, since it uses less digits than its factorization.

28605584138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8413.

The product of its (nonzero) digits is 1843200, while the sum is 50.

The spelling of 28605584138 in words is "twenty-eight billion, six hundred five million, five hundred eighty-four thousand, one hundred thirty-eight".