28457243 has 2 divisors, whose sum is σ = 28457244. Its totient is φ = 28457242.

The previous prime is 28457227. The next prime is 28457249. The reversal of 28457243 is 34275482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28457243 - 2⁴ = 28457227 is a prime.

It is a super-2 number, since 2×28457243² = 1619629358322098, which contains 22 as substring.

It is equal to p_1768085 and since 28457243 and 1768085 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28457249) 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, 14228621 + 14228622.

It is an arithmetic number, because the mean of its divisors is an integer number (14228622).

Almost surely, 2^28457243 is an apocalyptic number.

28457243 is a deficient number, since it is larger than the sum of its proper divisors (1).

28457243 is an equidigital number, since it uses as much as digits as its factorization.

28457243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 35.

The square root of 28457243 is about 5334.5330629775. The cubic root of 28457243 is about 305.3029078851.

The spelling of 28457243 in words is "twenty-eight million, four hundred fifty-seven thousand, two hundred forty-three".