28169916883488 has 120 divisors (see below), whose sum is σ = 82848968236188. Its totient is φ = 9389742759936.

The previous prime is 28169916883487. The next prime is 28169916883489. The reversal of 28169916883488 is 88438861996182.

28169916883488 is a `hidden beast` number, since 28 + 1 + 6 + 99 + 168 + 8 + 348 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (28169916883487) and next prime (28169916883489).

It can be written as a sum of positive squares in 2 ways, for example, as 19186397331984 + 8983519551504 = 4380228^2 + 2997252^2 .

It is a super-2 number, since 2×28169916883488² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (28169916883481) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 130822120 + ... + 131037272.

Almost surely, 2^{28169916883488} is an apocalyptic number.

It is an amenable number.

28169916883488 is an abundant number, since it is smaller than the sum of its proper divisors (54679051352700).

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

28169916883488 is a wasteful number, since it uses less digits than its factorization.

28169916883488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265688 (or 265671 counting only the distinct ones).

The product of its digits is 2293235712, while the sum is 81.

The spelling of 28169916883488 in words is "twenty-eight trillion, one hundred sixty-nine billion, nine hundred sixteen million, eight hundred eighty-three thousand, four hundred eighty-eight".