28304229105 has 24 divisors (see below), whose sum is σ = 50386630632. Its totient is φ = 14687599104.

The previous prime is 28304229097. The next prime is 28304229139. The reversal of 28304229105 is 50192240382.

It is a happy number.

28304229105 is a `hidden beast` number, since 28 + 304 + 229 + 105 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 16911441936 + 11392787169 = 130044^2 + 106737^2 .

It is not a de Polignac number, because 28304229105 - 2³ = 28304229097 is a prime.

It is a super-2 number, since 2×28304229105² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28304229105.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8498104 + ... + 8501433.

It is an arithmetic number, because the mean of its divisors is an integer number (2099442943).

Almost surely, 2^28304229105 is an apocalyptic number.

It is an amenable number.

28304229105 is a deficient number, since it is larger than the sum of its proper divisors (22082401527).

28304229105 is a wasteful number, since it uses less digits than its factorization.

28304229105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16999585 (or 16999582 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 28304229105 its reverse (50192240382), we get a palindrome (78496469487).

The spelling of 28304229105 in words is "twenty-eight billion, three hundred four million, two hundred twenty-nine thousand, one hundred five".