28169159 has 2 divisors, whose sum is σ = 28169160. Its totient is φ = 28169158.

The previous prime is 28169149. The next prime is 28169177. The reversal of 28169159 is 95196182.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28169159 - 2¹⁶ = 28103623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28169149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14084579 + 14084580.

It is an arithmetic number, because the mean of its divisors is an integer number (14084580).

Almost surely, 2^28169159 is an apocalyptic number.

28169159 is a deficient number, since it is larger than the sum of its proper divisors (1).

28169159 is an equidigital number, since it uses as much as digits as its factorization.

28169159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 41.

The square root of 28169159 is about 5307.4625764107. The cubic root of 28169159 is about 304.2691774158.

The spelling of 28169159 in words is "twenty-eight million, one hundred sixty-nine thousand, one hundred fifty-nine".