28799216906 has 4 divisors (see below), whose sum is σ = 43198825362. Its totient is φ = 14399608452.

The previous prime is 28799216899. The next prime is 28799216977. The reversal of 28799216906 is 60961299782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26515237225 + 2283979681 = 162835^2 + 47791^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7199804225 + ... + 7199804228.

Almost surely, 2^28799216906 is an apocalyptic number.

28799216906 is a deficient number, since it is larger than the sum of its proper divisors (14399608456).

28799216906 is a wasteful number, since it uses less digits than its factorization.

28799216906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14399608455.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The spelling of 28799216906 in words is "twenty-eight billion, seven hundred ninety-nine million, two hundred sixteen thousand, nine hundred six".