28107533 has 2 divisors, whose sum is σ = 28107534. Its totient is φ = 28107532.

The previous prime is 28107529. The next prime is 28107559. The reversal of 28107533 is 33570182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27071209 + 1036324 = 5203^2 + 1018^2 .

It is a cyclic number.

It is not a de Polignac number, because 28107533 - 2² = 28107529 is a prime.

It is a super-2 number, since 2×28107533² = 1580066822692178, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28107496 and 28107505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28107133) 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, 14053766 + 14053767.

It is an arithmetic number, because the mean of its divisors is an integer number (14053767).

Almost surely, 2^28107533 is an apocalyptic number.

It is an amenable number.

28107533 is a deficient number, since it is larger than the sum of its proper divisors (1).

28107533 is an equidigital number, since it uses as much as digits as its factorization.

28107533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 28107533 is about 5301.6537985802. The cubic root of 28107533 is about 304.0471309948.

The spelling of 28107533 in words is "twenty-eight million, one hundred seven thousand, five hundred thirty-three".