28219673 has 2 divisors, whose sum is σ = 28219674. Its totient is φ = 28219672.

The previous prime is 28219661. The next prime is 28219687. The reversal of 28219673 is 37691282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27164944 + 1054729 = 5212^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 28219673 - 2¹⁸ = 27957529 is a prime.

It is not a weakly prime, because it can be changed into another prime (28219613) 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, 14109836 + 14109837.

It is an arithmetic number, because the mean of its divisors is an integer number (14109837).

Almost surely, 2^28219673 is an apocalyptic number.

It is an amenable number.

28219673 is a deficient number, since it is larger than the sum of its proper divisors (1).

28219673 is an equidigital number, since it uses as much as digits as its factorization.

28219673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 28219673 is about 5312.2192161092. The cubic root of 28219673 is about 304.4509444694.

The spelling of 28219673 in words is "twenty-eight million, two hundred nineteen thousand, six hundred seventy-three".