28633771 has 2 divisors, whose sum is σ = 28633772. Its totient is φ = 28633770.

The previous prime is 28633769. The next prime is 28633793. The reversal of 28633771 is 17733682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28633771 - 2¹ = 28633769 is a prime.

Together with 28633769, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28633771.

It is not a weakly prime, because it can be changed into another prime (28633751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14316885 + 14316886.

It is an arithmetic number, because the mean of its divisors is an integer number (14316886).

Almost surely, 2^28633771 is an apocalyptic number.

28633771 is a deficient number, since it is larger than the sum of its proper divisors (1).

28633771 is an equidigital number, since it uses as much as digits as its factorization.

28633771 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 28633771 is about 5351.0532608076. The cubic root of 28633771 is about 305.9328992659.

The spelling of 28633771 in words is "twenty-eight million, six hundred thirty-three thousand, seven hundred seventy-one".