28376189 has 2 divisors, whose sum is σ = 28376190. Its totient is φ = 28376188.

The previous prime is 28376149. The next prime is 28376207. The reversal of 28376189 is 98167382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27825625 + 550564 = 5275^2 + 742^2 .

It is a cyclic number.

It is not a de Polignac number, because 28376189 - 2¹² = 28372093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28376119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14188094 + 14188095.

It is an arithmetic number, because the mean of its divisors is an integer number (14188095).

Almost surely, 2^28376189 is an apocalyptic number.

It is an amenable number.

28376189 is a deficient number, since it is larger than the sum of its proper divisors (1).

28376189 is an equidigital number, since it uses as much as digits as its factorization.

28376189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 28376189 is about 5326.9305420664. The cubic root of 28376189 is about 305.0127702259.

The spelling of 28376189 in words is "twenty-eight million, three hundred seventy-six thousand, one hundred eighty-nine".