28061250305 has 16 divisors (see below), whose sum is σ = 36797350464. Its totient is φ = 20373391680.

The previous prime is 28061250293. The next prime is 28061250323. The reversal of 28061250305 is 50305216082.

It is not a de Polignac number, because 28061250305 - 2⁴ = 28061250289 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402302 + ... + 466871.

It is an arithmetic number, because the mean of its divisors is an integer number (2299834404).

Almost surely, 2^28061250305 is an apocalyptic number.

It is an amenable number.

28061250305 is a deficient number, since it is larger than the sum of its proper divisors (8736100159).

28061250305 is a wasteful number, since it uses less digits than its factorization.

28061250305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869776.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 28061250305 its reverse (50305216082), we get a palindrome (78366466387).

The spelling of 28061250305 in words is "twenty-eight billion, sixty-one million, two hundred fifty thousand, three hundred five".