28382869 has 2 divisors, whose sum is σ = 28382870. Its totient is φ = 28382868.

The previous prime is 28382867. The next prime is 28382891. The reversal of 28382869 is 96828382.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 1238769 = 5210^2 + 1113^2 .

It is a cyclic number.

It is not a de Polignac number, because 28382869 - 2¹ = 28382867 is a prime.

It is a super-2 number, since 2×28382869² = 1611174505342322, which contains 22 as substring.

Together with 28382867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28382867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14191434 + 14191435.

It is an arithmetic number, because the mean of its divisors is an integer number (14191435).

Almost surely, 2^28382869 is an apocalyptic number.

It is an amenable number.

28382869 is a deficient number, since it is larger than the sum of its proper divisors (1).

28382869 is an equidigital number, since it uses as much as digits as its factorization.

28382869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 46.

The square root of 28382869 is about 5327.5575079017. The cubic root of 28382869 is about 305.0367025616.

The spelling of 28382869 in words is "twenty-eight million, three hundred eighty-two thousand, eight hundred sixty-nine".