28162273 has 2 divisors, whose sum is σ = 28162274. Its totient is φ = 28162272.

The previous prime is 28162271. The next prime is 28162307. The reversal of 28162273 is 37226182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22344529 + 5817744 = 4727^2 + 2412^2 .

It is a cyclic number.

It is not a de Polignac number, because 28162273 - 2¹ = 28162271 is a prime.

It is a super-2 number, since 2×28162273² = 1586227241053058, which contains 22 as substring.

Together with 28162271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28162271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14081136 + 14081137.

It is an arithmetic number, because the mean of its divisors is an integer number (14081137).

Almost surely, 2^28162273 is an apocalyptic number.

It is an amenable number.

28162273 is a deficient number, since it is larger than the sum of its proper divisors (1).

28162273 is an equidigital number, since it uses as much as digits as its factorization.

28162273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 28162273 is about 5306.8138275240. The cubic root of 28162273 is about 304.2443823518.

The spelling of 28162273 in words is "twenty-eight million, one hundred sixty-two thousand, two hundred seventy-three".