28081830205 has 32 divisors (see below), whose sum is σ = 41918300928. Its totient is φ = 17743180800.

The previous prime is 28081830193. The next prime is 28081830233. The reversal of 28081830205 is 50203818082.

It is not a de Polignac number, because 28081830205 - 2⁹ = 28081829693 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, 1143001 + ... + 1167310.

It is an arithmetic number, because the mean of its divisors is an integer number (1309946904).

Almost surely, 2^28081830205 is an apocalyptic number.

It is an amenable number.

28081830205 is a deficient number, since it is larger than the sum of its proper divisors (13836470723).

28081830205 is a wasteful number, since it uses less digits than its factorization.

28081830205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310357.

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 28081830205 in words is "twenty-eight billion, eighty-one million, eight hundred thirty thousand, two hundred five".