28914517 has 2 divisors, whose sum is σ = 28914518. Its totient is φ = 28914516.

The previous prime is 28914511. The next prime is 28914551. The reversal of 28914517 is 71541982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18584721 + 10329796 = 4311^2 + 3214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28914517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28914511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14457258 + 14457259.

It is an arithmetic number, because the mean of its divisors is an integer number (14457259).

Almost surely, 2^28914517 is an apocalyptic number.

It is an amenable number.

28914517 is a deficient number, since it is larger than the sum of its proper divisors (1).

28914517 is an equidigital number, since it uses as much as digits as its factorization.

28914517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 28914517 is about 5377.2220523240. Note that the first 3 decimals coincide. The cubic root of 28914517 is about 306.9295109203.

The spelling of 28914517 in words is "twenty-eight million, nine hundred fourteen thousand, five hundred seventeen".