28233143 has 2 divisors, whose sum is σ = 28233144. Its totient is φ = 28233142.

The previous prime is 28233131. The next prime is 28233169. The reversal of 28233143 is 34133282.

It is an a-pointer prime, because the next prime (28233169) can be obtained adding 28233143 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28233143 - 2²⁰ = 27184567 is a prime.

It is a super-2 number, since 2×28233143² = 1594220727316898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28233103) 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, 14116571 + 14116572.

It is an arithmetic number, because the mean of its divisors is an integer number (14116572).

Almost surely, 2^28233143 is an apocalyptic number.

28233143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28233143 is an equidigital number, since it uses as much as digits as its factorization.

28233143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 28233143 is about 5313.4868965680. The cubic root of 28233143 is about 304.4993776068.

It can be divided in two parts, 282 and 33143, that multiplied together give a triangular number (9346326 = T₄₃₂₃).

The spelling of 28233143 in words is "twenty-eight million, two hundred thirty-three thousand, one hundred forty-three".