28876121 has 2 divisors, whose sum is σ = 28876122. Its totient is φ = 28876120.

The previous prime is 28876093. The next prime is 28876151. The reversal of 28876121 is 12167882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 403225 = 5336^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 28876121 - 2¹⁴ = 28859737 is a prime.

It is a super-3 number, since 3×28876121³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28876151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14438060 + 14438061.

It is an arithmetic number, because the mean of its divisors is an integer number (14438061).

Almost surely, 2^28876121 is an apocalyptic number.

It is an amenable number.

28876121 is a deficient number, since it is larger than the sum of its proper divisors (1).

28876121 is an equidigital number, since it uses as much as digits as its factorization.

28876121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 35.

The square root of 28876121 is about 5373.6506213188. The cubic root of 28876121 is about 306.7935920462.

The spelling of 28876121 in words is "twenty-eight million, eight hundred seventy-six thousand, one hundred twenty-one".