28778422210 has 16 divisors (see below), whose sum is σ = 51803768376. Its totient is φ = 11510789248.

The previous prime is 28778422201. The next prime is 28778422229. The reversal of 28778422210 is 1222487782.

It can be written as a sum of positive squares in 4 ways, for example, as 20859736041 + 7918686169 = 144429^2 + 88987^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176952 + ... + 298108.

Almost surely, 2^28778422210 is an apocalyptic number.

28778422210 is a deficient number, since it is larger than the sum of its proper divisors (23025346166).

28778422210 is a wasteful number, since it uses less digits than its factorization.

28778422210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144917.

The product of its (nonzero) digits is 200704, while the sum is 43.

The spelling of 28778422210 in words is "twenty-eight billion, seven hundred seventy-eight million, four hundred twenty-two thousand, two hundred ten".