28980761 has 2 divisors, whose sum is σ = 28980762. Its totient is φ = 28980760.

The previous prime is 28980739. The next prime is 28980769. The reversal of 28980761 is 16708982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28955161 + 25600 = 5381^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 28980761 - 2¹⁰ = 28979737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28980769) 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, 14490380 + 14490381.

It is an arithmetic number, because the mean of its divisors is an integer number (14490381).

Almost surely, 2^28980761 is an apocalyptic number.

It is an amenable number.

28980761 is a deficient number, since it is larger than the sum of its proper divisors (1).

28980761 is an equidigital number, since it uses as much as digits as its factorization.

28980761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28980761 is about 5383.3782144672. The cubic root of 28980761 is about 307.1637269602.

The spelling of 28980761 in words is "twenty-eight million, nine hundred eighty thousand, seven hundred sixty-one".