28727205965 has 32 divisors (see below), whose sum is σ = 38151150336. Its totient is φ = 20654853120.

The previous prime is 28727205887. The next prime is 28727205973. The reversal of 28727205965 is 56950272782.

It is not a de Polignac number, because 28727205965 - 2¹⁰ = 28727204941 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, 1186430 + ... + 1210400.

It is an arithmetic number, because the mean of its divisors is an integer number (1192223448).

Almost surely, 2^28727205965 is an apocalyptic number.

It is an amenable number.

28727205965 is a deficient number, since it is larger than the sum of its proper divisors (9423944371).

28727205965 is a wasteful number, since it uses less digits than its factorization.

28727205965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24629.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 28727205965 in words is "twenty-eight billion, seven hundred twenty-seven million, two hundred five thousand, nine hundred sixty-five".