28453401281 has 4 divisors (see below), whose sum is σ = 28464210372. Its totient is φ = 28442592192.

The previous prime is 28453401247. The next prime is 28453401283. The reversal of 28453401281 is 18210435482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18210435482 = 2 ⋅9105217741.

It can be written as a sum of positive squares in 2 ways, for example, as 2344012225 + 26109389056 = 48415^2 + 161584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28453401281 is a prime.

It is a super-3 number, since 3×28453401281³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28453401283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5400596 + ... + 5405861.

It is an arithmetic number, because the mean of its divisors is an integer number (7116052593).

Almost surely, 2^28453401281 is an apocalyptic number.

It is an amenable number.

28453401281 is a deficient number, since it is larger than the sum of its proper divisors (10809091).

28453401281 is a wasteful number, since it uses less digits than its factorization.

28453401281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10809090.

The product of its (nonzero) digits is 61440, while the sum is 38.

The spelling of 28453401281 in words is "twenty-eight billion, four hundred fifty-three million, four hundred one thousand, two hundred eighty-one".