28805423 has 2 divisors, whose sum is σ = 28805424. Its totient is φ = 28805422.

The previous prime is 28805419. The next prime is 28805431. The reversal of 28805423 is 32450882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28805423 - 2² = 28805419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28805423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28804423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14402711 + 14402712.

It is an arithmetic number, because the mean of its divisors is an integer number (14402712).

Almost surely, 2^28805423 is an apocalyptic number.

28805423 is a deficient number, since it is larger than the sum of its proper divisors (1).

28805423 is an equidigital number, since it uses as much as digits as its factorization.

28805423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 28805423 is about 5367.0683804103. The cubic root of 28805423 is about 306.5430110835.

The spelling of 28805423 in words is "twenty-eight million, eight hundred five thousand, four hundred twenty-three".