28478274942017 has 16 divisors (see below), whose sum is σ = 29361249867600. Its totient is φ = 27601294786560.

The previous prime is 28478274941993. The next prime is 28478274942041. The reversal of 28478274942017 is 71024947287482.

It is a Cunningham number, because it is equal to 5336504²+1.

It is an interprime number because it is at equal distance from previous prime (28478274941993) and next prime (28478274942041).

It can be written as a sum of positive squares in 8 ways, for example, as 28521805456 + 28449753136561 = 168884^2 + 5333831^2 .

It is a cyclic number.

It is not a de Polignac number, because 28478274942017 - 2²⁰ = 28478273893441 is a prime.

It is a super-2 number, since 2×28478274942017² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28478274942077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64764017 + ... + 65202257.

It is an arithmetic number, because the mean of its divisors is an integer number (1835078116725).

Almost surely, 2^{28478274942017} is an apocalyptic number.

It is an amenable number.

28478274942017 is a deficient number, since it is larger than the sum of its proper divisors (882974925583).

28478274942017 is a wasteful number, since it uses less digits than its factorization.

28478274942017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445076.

The product of its (nonzero) digits is 101154816, while the sum is 65.

The spelling of 28478274942017 in words is "twenty-eight trillion, four hundred seventy-eight billion, two hundred seventy-four million, nine hundred forty-two thousand, seventeen".