28478088945 has 40 divisors (see below), whose sum is σ = 51314257896. Its totient is φ = 15109576704.

The previous prime is 28478088931. The next prime is 28478088959. The reversal of 28478088945 is 54988087482.

It is an interprime number because it is at equal distance from previous prime (28478088931) and next prime (28478088959).

It can be written as a sum of positive squares in 4 ways, for example, as 116834481 + 28361254464 = 10809^2 + 168408^2 .

It is not a de Polignac number, because 28478088945 - 2¹⁰ = 28478087921 is a prime.

It is a super-2 number, since 2×28478088945² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104002 + ... + 260331.

Almost surely, 2^28478088945 is an apocalyptic number.

It is an amenable number.

28478088945 is a deficient number, since it is larger than the sum of its proper divisors (22836168951).

28478088945 is a wasteful number, since it uses less digits than its factorization.

28478088945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364543 (or 364534 counting only the distinct ones).

The product of its (nonzero) digits is 41287680, while the sum is 63.

The spelling of 28478088945 in words is "twenty-eight billion, four hundred seventy-eight million, eighty-eight thousand, nine hundred forty-five".