28809718066 has 16 divisors (see below), whose sum is σ = 47334426840. Its totient is φ = 13090013440.

The previous prime is 28809718057. The next prime is 28809718079. The reversal of 28809718066 is 66081790882.

It can be written as a sum of positive squares in 4 ways, for example, as 28130333841 + 679384225 = 167721^2 + 26065^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28809717998 and 28809718016.

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 7 ways as a sum of consecutive naturals, for example, 14608405 + ... + 14610376.

Almost surely, 2^28809718066 is an apocalyptic number.

28809718066 is a deficient number, since it is larger than the sum of its proper divisors (18524708774).

28809718066 is a wasteful number, since it uses less digits than its factorization.

28809718066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29218829.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 28809718066 in words is "twenty-eight billion, eight hundred nine million, seven hundred eighteen thousand, sixty-six".