28232273 has 2 divisors, whose sum is σ = 28232274. Its totient is φ = 28232272.

The previous prime is 28232263. The next prime is 28232299. The reversal of 28232273 is 37223282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19775809 + 8456464 = 4447^2 + 2908^2 .

It is a cyclic number.

It is not a de Polignac number, because 28232273 - 2¹⁰ = 28231249 is a prime.

It is a super-2 number, since 2×28232273² = 1594122477493058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28232213) 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, 14116136 + 14116137.

It is an arithmetic number, because the mean of its divisors is an integer number (14116137).

Almost surely, 2^28232273 is an apocalyptic number.

It is an amenable number.

28232273 is a deficient number, since it is larger than the sum of its proper divisors (1).

28232273 is an equidigital number, since it uses as much as digits as its factorization.

28232273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 29.

The square root of 28232273 is about 5313.4050287927. The cubic root of 28232273 is about 304.4962498740.

The spelling of 28232273 in words is "twenty-eight million, two hundred thirty-two thousand, two hundred seventy-three".