28105723 has 2 divisors, whose sum is σ = 28105724. Its totient is φ = 28105722.

The previous prime is 28105717. The next prime is 28105729. The reversal of 28105723 is 32750182.

It is a balanced prime because it is at equal distance from previous prime (28105717) and next prime (28105729).

It is a cyclic number.

It is not a de Polignac number, because 28105723 - 2¹⁷ = 27974651 is a prime.

It is equal to p_1747612 and since 28105723 and 1747612 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 28105691 and 28105700.

It is not a weakly prime, because it can be changed into another prime (28105729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14052861 + 14052862.

It is an arithmetic number, because the mean of its divisors is an integer number (14052862).

Almost surely, 2^28105723 is an apocalyptic number.

28105723 is a deficient number, since it is larger than the sum of its proper divisors (1).

28105723 is an equidigital number, since it uses as much as digits as its factorization.

28105723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 28105723 is about 5301.4830943803. The cubic root of 28105723 is about 304.0406044274.

The spelling of 28105723 in words is "twenty-eight million, one hundred five thousand, seven hundred twenty-three".