28617733 has 2 divisors, whose sum is σ = 28617734. Its totient is φ = 28617732.

The previous prime is 28617731. The next prime is 28617763. The reversal of 28617733 is 33771682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14607684 + 14010049 = 3822^2 + 3743^2 .

It is a cyclic number.

It is not a de Polignac number, because 28617733 - 2¹ = 28617731 is a prime.

Together with 28617731, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28617692 and 28617701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28617731) 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, 14308866 + 14308867.

It is an arithmetic number, because the mean of its divisors is an integer number (14308867).

Almost surely, 2^28617733 is an apocalyptic number.

It is an amenable number.

28617733 is a deficient number, since it is larger than the sum of its proper divisors (1).

28617733 is an equidigital number, since it uses as much as digits as its factorization.

28617733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 28617733 is about 5349.5544674300. The cubic root of 28617733 is about 305.8757701253.

The spelling of 28617733 in words is "twenty-eight million, six hundred seventeen thousand, seven hundred thirty-three".