28091050281 has 48 divisors (see below), whose sum is σ = 47167635840. Its totient is φ = 15777192960.

The previous prime is 28091050271. The next prime is 28091050319. The reversal of 28091050281 is 18205019082.

It is not a de Polignac number, because 28091050281 - 2¹⁴ = 28091033897 is a prime.

It is a super-2 number, since 2×28091050281² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28091050231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9963490 + ... + 9966308.

It is an arithmetic number, because the mean of its divisors is an integer number (982659080).

Almost surely, 2^28091050281 is an apocalyptic number.

28091050281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28091050281 is a deficient number, since it is larger than the sum of its proper divisors (19076585559).

28091050281 is a wasteful number, since it uses less digits than its factorization.

28091050281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486 (or 5483 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 28091050281 in words is "twenty-eight billion, ninety-one million, fifty thousand, two hundred eighty-one".