28025533 has 2 divisors, whose sum is σ = 28025534. Its totient is φ = 28025532.

The previous prime is 28025507. The next prime is 28025561. The reversal of 28025533 is 33552082.

It is an a-pointer prime, because the next prime (28025561) can be obtained adding 28025533 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15824484 + 12201049 = 3978^2 + 3493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28025533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28025633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14012766 + 14012767.

It is an arithmetic number, because the mean of its divisors is an integer number (14012767).

Almost surely, 2^28025533 is an apocalyptic number.

It is an amenable number.

28025533 is a deficient number, since it is larger than the sum of its proper divisors (1).

28025533 is an equidigital number, since it uses as much as digits as its factorization.

28025533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 28025533 is about 5293.9147140845. The cubic root of 28025533 is about 303.7511706052.

The spelling of 28025533 in words is "twenty-eight million, twenty-five thousand, five hundred thirty-three".