28338143 has 2 divisors, whose sum is σ = 28338144. Its totient is φ = 28338142.

The previous prime is 28338137. The next prime is 28338173. The reversal of 28338143 is 34183382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28338143 - 2⁴ = 28338127 is a prime.

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 (28338103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14169071 + 14169072.

It is an arithmetic number, because the mean of its divisors is an integer number (14169072).

Almost surely, 2^28338143 is an apocalyptic number.

28338143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28338143 is an equidigital number, since it uses as much as digits as its factorization.

28338143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 28338143 is about 5323.3582445671. The cubic root of 28338143 is about 304.8763917284.

The spelling of 28338143 in words is "twenty-eight million, three hundred thirty-eight thousand, one hundred forty-three".