28333553 has 2 divisors, whose sum is σ = 28333554. Its totient is φ = 28333552.

The previous prime is 28333523. The next prime is 28333561. The reversal of 28333553 is 35533382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19998784 + 8334769 = 4472^2 + 2887^2 .

It is a cyclic number.

It is not a de Polignac number, because 28333553 - 2¹⁰ = 28332529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28333523) 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, 14166776 + 14166777.

It is an arithmetic number, because the mean of its divisors is an integer number (14166777).

Almost surely, 2^28333553 is an apocalyptic number.

It is an amenable number.

28333553 is a deficient number, since it is larger than the sum of its proper divisors (1).

28333553 is an equidigital number, since it uses as much as digits as its factorization.

28333553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 32.

The square root of 28333553 is about 5322.9271082742. The cubic root of 28333553 is about 304.8599303087.

The spelling of 28333553 in words is "twenty-eight million, three hundred thirty-three thousand, five hundred fifty-three".