28354121 has 2 divisors, whose sum is σ = 28354122. Its totient is φ = 28354120.

The previous prime is 28354111. The next prime is 28354153. The reversal of 28354121 is 12145382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 9388096 = 4355^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 28354121 - 2¹⁸ = 28091977 is a prime.

It is a super-3 number, since 3×28354121³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28354111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14177060 + 14177061.

It is an arithmetic number, because the mean of its divisors is an integer number (14177061).

Almost surely, 2^28354121 is an apocalyptic number.

It is an amenable number.

28354121 is a deficient number, since it is larger than the sum of its proper divisors (1).

28354121 is an equidigital number, since it uses as much as digits as its factorization.

28354121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 28354121 is about 5324.8587774701. The cubic root of 28354121 is about 304.9336808238.

The spelling of 28354121 in words is "twenty-eight million, three hundred fifty-four thousand, one hundred twenty-one".