228789771506 has 16 divisors (see below), whose sum is σ = 352696163544. Its totient is φ = 111228528384.

The previous prime is 228789771403. The next prime is 228789771517. The reversal of 228789771506 is 605177987822.

It can be written as a sum of positive squares in 4 ways, for example, as 203775502225 + 25014269281 = 451415^2 + 158159^2 .

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, 924935 + ... + 1145898.

Almost surely, 2^228789771506 is an apocalyptic number.

228789771506 is a deficient number, since it is larger than the sum of its proper divisors (123906392038).

228789771506 is a wasteful number, since it uses less digits than its factorization.

228789771506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072365.

The product of its (nonzero) digits is 23708160, while the sum is 62.

The spelling of 228789771506 in words is "two hundred twenty-eight billion, seven hundred eighty-nine million, seven hundred seventy-one thousand, five hundred six".