28293823 has 2 divisors, whose sum is σ = 28293824. Its totient is φ = 28293822.

The previous prime is 28293781. The next prime is 28293827. The reversal of 28293823 is 32839282.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28293823 - 2¹⁷ = 28162751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28293827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14146911 + 14146912.

It is an arithmetic number, because the mean of its divisors is an integer number (14146912).

Almost surely, 2^28293823 is an apocalyptic number.

28293823 is a deficient number, since it is larger than the sum of its proper divisors (1).

28293823 is an equidigital number, since it uses as much as digits as its factorization.

28293823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 28293823 is about 5319.1938298957. The cubic root of 28293823 is about 304.7173696406.

The spelling of 28293823 in words is "twenty-eight million, two hundred ninety-three thousand, eight hundred twenty-three".