28230481 has 2 divisors, whose sum is σ = 28230482. Its totient is φ = 28230480.

The previous prime is 28230473. The next prime is 28230493. The reversal of 28230481 is 18403282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27248400 + 982081 = 5220^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 28230481 - 2³ = 28230473 is a prime.

It is a super-2 number, since 2×28230481² = 1593920114982722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28230581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14115240 + 14115241.

It is an arithmetic number, because the mean of its divisors is an integer number (14115241).

Almost surely, 2^28230481 is an apocalyptic number.

It is an amenable number.

28230481 is a deficient number, since it is larger than the sum of its proper divisors (1).

28230481 is an equidigital number, since it uses as much as digits as its factorization.

28230481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28230481 is about 5313.2363960208. The cubic root of 28230481 is about 304.4898072611.

The spelling of 28230481 in words is "twenty-eight million, two hundred thirty thousand, four hundred eighty-one".