28523333 has 2 divisors, whose sum is σ = 28523334. Its totient is φ = 28523332.

The previous prime is 28523329. The next prime is 28523371. The reversal of 28523333 is 33332582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28058209 + 465124 = 5297^2 + 682^2 .

It is a cyclic number.

It is not a de Polignac number, because 28523333 - 2² = 28523329 is a prime.

It is a Sophie Germain prime.

28523333 is a modest number, since divided by 3333 gives 2852 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28523296 and 28523305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28523303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14261666 + 14261667.

It is an arithmetic number, because the mean of its divisors is an integer number (14261667).

Almost surely, 2^28523333 is an apocalyptic number.

It is an amenable number.

28523333 is a deficient number, since it is larger than the sum of its proper divisors (1).

28523333 is an equidigital number, since it uses as much as digits as its factorization.

28523333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 29.

The square root of 28523333 is about 5340.7240145883. The cubic root of 28523333 is about 305.5390735254.

Subtracting 28523333 from its reverse (33332582), we obtain a square (4809249 = 2193²).

The spelling of 28523333 in words is "twenty-eight million, five hundred twenty-three thousand, three hundred thirty-three".