28964009 has 2 divisors, whose sum is σ = 28964010. Its totient is φ = 28964008.

The previous prime is 28963967. The next prime is 28964017. The reversal of 28964009 is 90046982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28858384 + 105625 = 5372^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 28964009 - 2¹² = 28959913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28964609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14482004 + 14482005.

It is an arithmetic number, because the mean of its divisors is an integer number (14482005).

Almost surely, 2^28964009 is an apocalyptic number.

It is an amenable number.

28964009 is a deficient number, since it is larger than the sum of its proper divisors (1).

28964009 is an equidigital number, since it uses as much as digits as its factorization.

28964009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 28964009 is about 5381.8220892185. The cubic root of 28964009 is about 307.1045313841.

It can be divided in two parts, 289 and 64009, that multiplied together give a square (18498601 = 4301²).

The spelling of 28964009 in words is "twenty-eight million, nine hundred sixty-four thousand, nine".