28458173 has 2 divisors, whose sum is σ = 28458174. Its totient is φ = 28458172.

The previous prime is 28458169. The next prime is 28458229. The reversal of 28458173 is 37185482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17455684 + 11002489 = 4178^2 + 3317^2 .

It is a cyclic number.

It is not a de Polignac number, because 28458173 - 2² = 28458169 is a prime.

It is a super-2 number, since 2×28458173² = 1619735220995858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28458103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14229086 + 14229087.

It is an arithmetic number, because the mean of its divisors is an integer number (14229087).

Almost surely, 2^28458173 is an apocalyptic number.

It is an amenable number.

28458173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28458173 is an equidigital number, since it uses as much as digits as its factorization.

28458173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 28458173 is about 5334.6202301570. The cubic root of 28458173 is about 305.3062336771.

The spelling of 28458173 in words is "twenty-eight million, four hundred fifty-eight thousand, one hundred seventy-three".