28912817886336 has 96 divisors (see below), whose sum is σ = 84057373845900. Its totient is φ = 9538249162752.

The previous prime is 28912817886299. The next prime is 28912817886343. The reversal of 28912817886336 is 63368871821982.

28912817886336 is a `hidden beast` number, since 2 + 8 + 9 + 1 + 281 + 7 + 8 + 8 + 6 + 336 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28832002767936 + 80815118400 = 5369544^2 + 284280^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129259041 + ... + 129482528.

Almost surely, 2^{28912817886336} is an apocalyptic number.

It is an amenable number.

28912817886336 is an abundant number, since it is smaller than the sum of its proper divisors (55144555959564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28912817886336 is a wasteful number, since it uses less digits than its factorization.

28912817886336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258741686 (or 258741671 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 72.

The spelling of 28912817886336 in words is "twenty-eight trillion, nine hundred twelve billion, eight hundred seventeen million, eight hundred eighty-six thousand, three hundred thirty-six".