28358623 has 2 divisors, whose sum is σ = 28358624. Its totient is φ = 28358622.

The previous prime is 28358599. The next prime is 28358633. The reversal of 28358623 is 32685382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28358623 - 2¹³ = 28350431 is a prime.

It is a super-3 number, since 3×28358623³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28358633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14179311 + 14179312.

It is an arithmetic number, because the mean of its divisors is an integer number (14179312).

Almost surely, 2^28358623 is an apocalyptic number.

28358623 is a deficient number, since it is larger than the sum of its proper divisors (1).

28358623 is an equidigital number, since it uses as much as digits as its factorization.

28358623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 37.

The square root of 28358623 is about 5325.2814949071. The cubic root of 28358623 is about 304.9498188516.

The spelling of 28358623 in words is "twenty-eight million, three hundred fifty-eight thousand, six hundred twenty-three".