28027398805 has 32 divisors (see below), whose sum is σ = 39506351616. Its totient is φ = 18685188864.

The previous prime is 28027398739. The next prime is 28027398827. The reversal of 28027398805 is 50889372082.

It is a cyclic number.

It is not a de Polignac number, because 28027398805 - 2²¹ = 28025301653 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 31 ways as a sum of consecutive naturals, for example, 1866387 + ... + 1881343.

It is an arithmetic number, because the mean of its divisors is an integer number (1234573488).

Almost surely, 2^28027398805 is an apocalyptic number.

It is an amenable number.

28027398805 is a deficient number, since it is larger than the sum of its proper divisors (11478952811).

28027398805 is a wasteful number, since it uses less digits than its factorization.

28027398805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16453.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 28027398805 in words is "twenty-eight billion, twenty-seven million, three hundred ninety-eight thousand, eight hundred five".