28495457 has 2 divisors, whose sum is σ = 28495458. Its totient is φ = 28495456.

The previous prime is 28495427. The next prime is 28495463. The reversal of 28495457 is 75459482.

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., 27363361 + 1132096 = 5231^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 28495457 - 2⁶ = 28495393 is a prime.

It is not a weakly prime, because it can be changed into another prime (28495427) 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, 14247728 + 14247729.

It is an arithmetic number, because the mean of its divisors is an integer number (14247729).

Almost surely, 2^28495457 is an apocalyptic number.

It is an amenable number.

28495457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28495457 is an equidigital number, since it uses as much as digits as its factorization.

28495457 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 28495457 is about 5338.1136181239. The cubic root of 28495457 is about 305.4395061133.

The spelling of 28495457 in words is "twenty-eight million, four hundred ninety-five thousand, four hundred fifty-seven".