28628273 has 2 divisors, whose sum is σ = 28628274. Its totient is φ = 28628272.

The previous prime is 28628267. The next prime is 28628287. The reversal of 28628273 is 37282682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25120144 + 3508129 = 5012^2 + 1873^2 .

It is a cyclic number.

It is not a de Polignac number, because 28628273 - 2¹² = 28624177 is a prime.

It is not a weakly prime, because it can be changed into another prime (28628203) 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, 14314136 + 14314137.

It is an arithmetic number, because the mean of its divisors is an integer number (14314137).

Almost surely, 2^28628273 is an apocalyptic number.

It is an amenable number.

28628273 is a deficient number, since it is larger than the sum of its proper divisors (1).

28628273 is an equidigital number, since it uses as much as digits as its factorization.

28628273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 28628273 is about 5350.5395055078. The cubic root of 28628273 is about 305.9133171817.

The spelling of 28628273 in words is "twenty-eight million, six hundred twenty-eight thousand, two hundred seventy-three".