28463281 has 16 divisors (see below), whose sum is σ = 35630208. Its totient is φ = 22089600.

The previous prime is 28463269. The next prime is 28463293. The reversal of 28463281 is 18236482.

It is an interprime number because it is at equal distance from previous prime (28463269) and next prime (28463293).

It is a cyclic number.

It is not a de Polignac number, because 28463281 - 2⁹ = 28462769 is a prime.

It is a super-2 number, since 2×28463281² = 1620316730569922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28463221) 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 15 ways as a sum of consecutive naturals, for example, 23511 + ... + 24691.

It is an arithmetic number, because the mean of its divisors is an integer number (2226888).

Almost surely, 2^28463281 is an apocalyptic number.

It is an amenable number.

28463281 is a deficient number, since it is larger than the sum of its proper divisors (7166927).

28463281 is a wasteful number, since it uses less digits than its factorization.

28463281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512.

The product of its digits is 18432, while the sum is 34.

The square root of 28463281 is about 5335.0989681542. The cubic root of 28463281 is about 305.3244992084.

The spelling of 28463281 in words is "twenty-eight million, four hundred sixty-three thousand, two hundred eighty-one".