28106123 has 2 divisors, whose sum is σ = 28106124. Its totient is φ = 28106122.

The previous prime is 28106107. The next prime is 28106129. The reversal of 28106123 is 32160182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28106123 - 2⁴ = 28106107 is a prime.

It is a super-2 number, since 2×28106123² = 1579908300182258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28106129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14053061 + 14053062.

It is an arithmetic number, because the mean of its divisors is an integer number (14053062).

Almost surely, 2^28106123 is an apocalyptic number.

28106123 is a deficient number, since it is larger than the sum of its proper divisors (1).

28106123 is an equidigital number, since it uses as much as digits as its factorization.

28106123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28106123 is about 5301.5208195385. The cubic root of 28106123 is about 304.0420467869.

The spelling of 28106123 in words is "twenty-eight million, one hundred six thousand, one hundred twenty-three".