28354457 has 2 divisors, whose sum is σ = 28354458. Its totient is φ = 28354456.

The previous prime is 28354451. The next prime is 28354499. The reversal of 28354457 is 75445382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27573001 + 781456 = 5251^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 28354457 - 2⁶ = 28354393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28354457.

It is not a weakly prime, because it can be changed into another prime (28354451) 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, 14177228 + 14177229.

It is an arithmetic number, because the mean of its divisors is an integer number (14177229).

Almost surely, 2^28354457 is an apocalyptic number.

It is an amenable number.

28354457 is a deficient number, since it is larger than the sum of its proper divisors (1).

28354457 is an equidigital number, since it uses as much as digits as its factorization.

28354457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 38.

The square root of 28354457 is about 5324.8903275091. The cubic root of 28354457 is about 304.9348853202.

The spelling of 28354457 in words is "twenty-eight million, three hundred fifty-four thousand, four hundred fifty-seven".