28980517 has 2 divisors, whose sum is σ = 28980518. Its totient is φ = 28980516.

The previous prime is 28980463. The next prime is 28980557. The reversal of 28980517 is 71508982.

It is an a-pointer prime, because the next prime (28980557) can be obtained adding 28980517 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21846276 + 7134241 = 4674^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 28980517 - 2¹⁹ = 28456229 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28980517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28980557) 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, 14490258 + 14490259.

It is an arithmetic number, because the mean of its divisors is an integer number (14490259).

Almost surely, 2^28980517 is an apocalyptic number.

It is an amenable number.

28980517 is a deficient number, since it is larger than the sum of its proper divisors (1).

28980517 is an equidigital number, since it uses as much as digits as its factorization.

28980517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 28980517 is about 5383.3555520697. The cubic root of 28980517 is about 307.1628649152.

The spelling of 28980517 in words is "twenty-eight million, nine hundred eighty thousand, five hundred seventeen".