28223123 has 2 divisors, whose sum is σ = 28223124. Its totient is φ = 28223122.

The previous prime is 28223099. The next prime is 28223131. The reversal of 28223123 is 32132282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28223123 - 2⁶ = 28223059 is a prime.

It is not a weakly prime, because it can be changed into another prime (28223183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14111561 + 14111562.

It is an arithmetic number, because the mean of its divisors is an integer number (14111562).

Almost surely, 2^28223123 is an apocalyptic number.

28223123 is a deficient number, since it is larger than the sum of its proper divisors (1).

28223123 is an equidigital number, since it uses as much as digits as its factorization.

28223123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 28223123 is about 5312.5439292301. The cubic root of 28223123 is about 304.4633508612.

The spelling of 28223123 in words is "twenty-eight million, two hundred twenty-three thousand, one hundred twenty-three".