28214933 has 2 divisors, whose sum is σ = 28214934. Its totient is φ = 28214932.

The previous prime is 28214873. The next prime is 28214939. The reversal of 28214933 is 33941282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20052484 + 8162449 = 4478^2 + 2857^2 .

It is a cyclic number.

It is not a de Polignac number, because 28214933 - 2¹⁴ = 28198549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28214933.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28214939) 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, 14107466 + 14107467.

It is an arithmetic number, because the mean of its divisors is an integer number (14107467).

Almost surely, 2^28214933 is an apocalyptic number.

It is an amenable number.

28214933 is a deficient number, since it is larger than the sum of its proper divisors (1).

28214933 is an equidigital number, since it uses as much as digits as its factorization.

28214933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 28214933 is about 5311.7730561461. The cubic root of 28214933 is about 304.4338975169.

The spelling of 28214933 in words is "twenty-eight million, two hundred fourteen thousand, nine hundred thirty-three".