28740185305 has 32 divisors (see below), whose sum is σ = 38168863488. Its totient is φ = 20636985600.

The previous prime is 28740185293. The next prime is 28740185311. The reversal of 28740185305 is 50358104782.

It is not a de Polignac number, because 28740185305 - 2²³ = 28731796697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5555370 + ... + 5560540.

It is an arithmetic number, because the mean of its divisors is an integer number (1192776984).

Almost surely, 2^28740185305 is an apocalyptic number.

It is an amenable number.

28740185305 is a deficient number, since it is larger than the sum of its proper divisors (9428678183).

28740185305 is a wasteful number, since it uses less digits than its factorization.

28740185305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7537.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 28740185305 in words is "twenty-eight billion, seven hundred forty million, one hundred eighty-five thousand, three hundred five".