28708423 has 2 divisors, whose sum is σ = 28708424. Its totient is φ = 28708422.

The previous prime is 28708417. The next prime is 28708429. The reversal of 28708423 is 32480782.

It is a balanced prime because it is at equal distance from previous prime (28708417) and next prime (28708429).

It is a cyclic number.

It is not a de Polignac number, because 28708423 - 2⁹ = 28707911 is a prime.

It is a super-2 number, since 2×28708423² = 1648347102293858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28708429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14354211 + 14354212.

It is an arithmetic number, because the mean of its divisors is an integer number (14354212).

Almost surely, 2^28708423 is an apocalyptic number.

28708423 is a deficient number, since it is larger than the sum of its proper divisors (1).

28708423 is an equidigital number, since it uses as much as digits as its factorization.

28708423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28708423 is about 5358.0241694117. The cubic root of 28708423 is about 306.1985376251.

The spelling of 28708423 in words is "twenty-eight million, seven hundred eight thousand, four hundred twenty-three".