28073923 has 2 divisors, whose sum is σ = 28073924. Its totient is φ = 28073922.

The previous prime is 28073917. The next prime is 28073933. The reversal of 28073923 is 32937082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28073923 is a prime.

It is not a weakly prime, because it can be changed into another prime (28073933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14036961 + 14036962.

It is an arithmetic number, because the mean of its divisors is an integer number (14036962).

Almost surely, 2^28073923 is an apocalyptic number.

28073923 is a deficient number, since it is larger than the sum of its proper divisors (1).

28073923 is an equidigital number, since it uses as much as digits as its factorization.

28073923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 28073923 is about 5298.4830848083. The cubic root of 28073923 is about 303.9258930338.

The spelling of 28073923 in words is "twenty-eight million, seventy-three thousand, nine hundred twenty-three".