28458013 has 2 divisors, whose sum is σ = 28458014. Its totient is φ = 28458012.

The previous prime is 28458011. The next prime is 28458037. The reversal of 28458013 is 31085482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28164249 + 293764 = 5307^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 28458013 - 2¹ = 28458011 is a prime.

Together with 28458011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28458011) 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, 14229006 + 14229007.

It is an arithmetic number, because the mean of its divisors is an integer number (14229007).

Almost surely, 2^28458013 is an apocalyptic number.

It is an amenable number.

28458013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28458013 is an equidigital number, since it uses as much as digits as its factorization.

28458013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28458013 is about 5334.6052337544. The cubic root of 28458013 is about 305.3056615030.

The spelling of 28458013 in words is "twenty-eight million, four hundred fifty-eight thousand, thirteen".