28980229 has 2 divisors, whose sum is σ = 28980230. Its totient is φ = 28980228.

The previous prime is 28980221. The next prime is 28980271. The reversal of 28980229 is 92208982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24029604 + 4950625 = 4902^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 28980229 - 2³ = 28980221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28980191 and 28980200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28980221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14490114 + 14490115.

It is an arithmetic number, because the mean of its divisors is an integer number (14490115).

Almost surely, 2^28980229 is an apocalyptic number.

It is an amenable number.

28980229 is a deficient number, since it is larger than the sum of its proper divisors (1).

28980229 is an equidigital number, since it uses as much as digits as its factorization.

28980229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28980229 is about 5383.3288028877. The cubic root of 28980229 is about 307.1618474132.

The spelling of 28980229 in words is "twenty-eight million, nine hundred eighty thousand, two hundred twenty-nine".