28920323 has 2 divisors, whose sum is σ = 28920324. Its totient is φ = 28920322.

The previous prime is 28920317. The next prime is 28920341. The reversal of 28920323 is 32302982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28920323 - 2²⁰ = 27871747 is a prime.

It is not a weakly prime, because it can be changed into another prime (28920343) 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, 14460161 + 14460162.

It is an arithmetic number, because the mean of its divisors is an integer number (14460162).

Almost surely, 2^28920323 is an apocalyptic number.

28920323 is a deficient number, since it is larger than the sum of its proper divisors (1).

28920323 is an equidigital number, since it uses as much as digits as its factorization.

28920323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 28920323 is about 5377.7618950638. The cubic root of 28920323 is about 306.9500532367.

The spelling of 28920323 in words is "twenty-eight million, nine hundred twenty thousand, three hundred twenty-three".