28980313 has 2 divisors, whose sum is σ = 28980314. Its totient is φ = 28980312.

The previous prime is 28980277. The next prime is 28980331. The reversal of 28980313 is 31308982.

Together with next prime (28980331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26915344 + 2064969 = 5188^2 + 1437^2 .

It is a cyclic number.

It is not a de Polignac number, because 28980313 - 2⁹ = 28979801 is a prime.

It is not a weakly prime, because it can be changed into another prime (28980383) 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, 14490156 + 14490157.

It is an arithmetic number, because the mean of its divisors is an integer number (14490157).

Almost surely, 2^28980313 is an apocalyptic number.

It is an amenable number.

28980313 is a deficient number, since it is larger than the sum of its proper divisors (1).

28980313 is an equidigital number, since it uses as much as digits as its factorization.

28980313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 28980313 is about 5383.3366047462. The cubic root of 28980313 is about 307.1621441853.

The spelling of 28980313 in words is "twenty-eight million, nine hundred eighty thousand, three hundred thirteen".