28475693 has 2 divisors, whose sum is σ = 28475694. Its totient is φ = 28475692.

The previous prime is 28475687. The next prime is 28475729. The reversal of 28475693 is 39657482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 11812969 = 4082^2 + 3437^2 .

It is a cyclic number.

It is not a de Polignac number, because 28475693 - 2¹⁶ = 28410157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28475393) 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 as a sum of consecutive naturals, namely, 14237846 + 14237847.

It is an arithmetic number, because the mean of its divisors is an integer number (14237847).

Almost surely, 2^28475693 is an apocalyptic number.

It is an amenable number.

28475693 is a deficient number, since it is larger than the sum of its proper divisors (1).

28475693 is an equidigital number, since it uses as much as digits as its factorization.

28475693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 28475693 is about 5336.2620812700. The cubic root of 28475693 is about 305.3688737713.

It can be divided in two parts, 2847 and 5693, that multiplied together give a triangular number (16207971 = T₅₆₉₃).

The spelling of 28475693 in words is "twenty-eight million, four hundred seventy-five thousand, six hundred ninety-three".