28277850285 has 24 divisors (see below), whose sum is σ = 49939754904. Its totient is φ = 14796961920.

The previous prime is 28277850241. The next prime is 28277850301. The reversal of 28277850285 is 58205877282.

28277850285 is a `hidden beast` number, since 282 + 7 + 7 + 85 + 0 + 285 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4196707524 + 24081142761 = 64782^2 + 155181^2 .

It is not a de Polignac number, because 28277850285 - 2¹¹ = 28277848237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5925886 + ... + 5930655.

It is an arithmetic number, because the mean of its divisors is an integer number (2080823121).

Almost surely, 2^28277850285 is an apocalyptic number.

It is an amenable number.

28277850285 is a deficient number, since it is larger than the sum of its proper divisors (21661904619).

28277850285 is a wasteful number, since it uses less digits than its factorization.

28277850285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11856605 (or 11856602 counting only the distinct ones).

The product of its (nonzero) digits is 5017600, while the sum is 54.

The spelling of 28277850285 in words is "twenty-eight billion, two hundred seventy-seven million, eight hundred fifty thousand, two hundred eighty-five".