10028281 has 4 divisors (see below), whose sum is σ = 10037412. Its totient is φ = 10019152.

The previous prime is 10028279. The next prime is 10028297. The reversal of 10028281 is 18282001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18282001 = 2011 ⋅9091.

It can be written as a sum of positive squares in 2 ways, for example, as 2689600 + 7338681 = 1640^2 + 2709^2 .

It is a cyclic number.

It is not a de Polignac number, because 10028281 - 2¹ = 10028279 is a prime.

It is a super-2 number, since 2×10028281² = 201132839629922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10028261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2650 + ... + 5203.

It is an arithmetic number, because the mean of its divisors is an integer number (2509353).

Almost surely, 2^10028281 is an apocalyptic number.

It is an amenable number.

10028281 is a deficient number, since it is larger than the sum of its proper divisors (9131).

10028281 is an equidigital number, since it uses as much as digits as its factorization.

10028281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9130.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 10028281 is about 3166.7461218102. The cubic root of 10028281 is about 215.6463764007.

The spelling of 10028281 in words is "ten million, twenty-eight thousand, two hundred eighty-one".