28594457 has 2 divisors, whose sum is σ = 28594458. Its totient is φ = 28594456.

The previous prime is 28594427. The next prime is 28594481. The reversal of 28594457 is 75449582.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15555136 + 13039321 = 3944^2 + 3611^2 .

It is a cyclic number.

It is not a de Polignac number, because 28594457 - 2⁶ = 28594393 is a prime.

It is a super-2 number, since 2×28594457² = 1635285942249698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28594427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14297228 + 14297229.

It is an arithmetic number, because the mean of its divisors is an integer number (14297229).

Almost surely, 2^28594457 is an apocalyptic number.

It is an amenable number.

28594457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28594457 is an equidigital number, since it uses as much as digits as its factorization.

28594457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 44.

The square root of 28594457 is about 5347.3785166191. The cubic root of 28594457 is about 305.7928204438.

The spelling of 28594457 in words is "twenty-eight million, five hundred ninety-four thousand, four hundred fifty-seven".