28457413 has 2 divisors, whose sum is σ = 28457414. Its totient is φ = 28457412.

The previous prime is 28457347. The next prime is 28457423. The reversal of 28457413 is 31475482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20493729 + 7963684 = 4527^2 + 2822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28457413 is a prime.

It is equal to p_1768093 and since 28457413 and 1768093 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28457423) 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, 14228706 + 14228707.

It is an arithmetic number, because the mean of its divisors is an integer number (14228707).

Almost surely, 2^28457413 is an apocalyptic number.

It is an amenable number.

28457413 is a deficient number, since it is larger than the sum of its proper divisors (1).

28457413 is an equidigital number, since it uses as much as digits as its factorization.

28457413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 34.

The square root of 28457413 is about 5334.5489968694. The cubic root of 28457413 is about 305.3035158310.

The spelling of 28457413 in words is "twenty-eight million, four hundred fifty-seven thousand, four hundred thirteen".