28179769 has 2 divisors, whose sum is σ = 28179770. Its totient is φ = 28179768.

The previous prime is 28179733. The next prime is 28179779. The reversal of 28179769 is 96797182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14341369 + 13838400 = 3787^2 + 3720^2 .

It is a cyclic number.

It is not a de Polignac number, because 28179769 - 2¹⁵ = 28147001 is a prime.

It is a super-2 number, since 2×28179769² = 1588198761786722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28179779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14089884 + 14089885.

It is an arithmetic number, because the mean of its divisors is an integer number (14089885).

Almost surely, 2^28179769 is an apocalyptic number.

It is an amenable number.

28179769 is a deficient number, since it is larger than the sum of its proper divisors (1).

28179769 is an equidigital number, since it uses as much as digits as its factorization.

28179769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 49.

The square root of 28179769 is about 5308.4620183251. The cubic root of 28179769 is about 304.3073739264.

The spelling of 28179769 in words is "twenty-eight million, one hundred seventy-nine thousand, seven hundred sixty-nine".