28927369 has 2 divisors, whose sum is σ = 28927370. Its totient is φ = 28927368.

The previous prime is 28927361. The next prime is 28927373. The reversal of 28927369 is 96372982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21160000 + 7767369 = 4600^2 + 2787^2 .

It is a cyclic number.

It is not a de Polignac number, because 28927369 - 2³ = 28927361 is a prime.

It is a super-2 number, since 2×28927369² = 1673585354524322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28927361) 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, 14463684 + 14463685.

It is an arithmetic number, because the mean of its divisors is an integer number (14463685).

Almost surely, 2^28927369 is an apocalyptic number.

It is an amenable number.

28927369 is a deficient number, since it is larger than the sum of its proper divisors (1).

28927369 is an equidigital number, since it uses as much as digits as its factorization.

28927369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 28927369 is about 5378.4169604076. The cubic root of 28927369 is about 306.9749791277.

The spelling of 28927369 in words is "twenty-eight million, nine hundred twenty-seven thousand, three hundred sixty-nine".