28888730285858 has 16 divisors (see below), whose sum is σ = 43877870718840. Its totient is φ = 14263202169216.

The previous prime is 28888730285837. The next prime is 28888730285861. The reversal of 28888730285858 is 85858203788882.

It can be written as a sum of positive squares in 4 ways, for example, as 26537055896569 + 2351674389289 = 5151413^2 + 1533517^2 .

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, 107062241 + ... + 107331732.

Almost surely, 2^{28888730285858} is an apocalyptic number.

28888730285858 is a deficient number, since it is larger than the sum of its proper divisors (14989140432982).

28888730285858 is a wasteful number, since it uses less digits than its factorization.

28888730285858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214394821.

The product of its (nonzero) digits is 4404019200, while the sum is 80.

The spelling of 28888730285858 in words is "twenty-eight trillion, eight hundred eighty-eight billion, seven hundred thirty million, two hundred eighty-five thousand, eight hundred fifty-eight".