28930169 has 2 divisors, whose sum is σ = 28930170. Its totient is φ = 28930168.

The previous prime is 28930151. The next prime is 28930193. The reversal of 28930169 is 96103982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23232400 + 5697769 = 4820^2 + 2387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28930169 is a prime.

It is a super-2 number, since 2×28930169² = 1673909356737122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28930199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14465084 + 14465085.

It is an arithmetic number, because the mean of its divisors is an integer number (14465085).

Almost surely, 2^28930169 is an apocalyptic number.

It is an amenable number.

28930169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28930169 is an equidigital number, since it uses as much as digits as its factorization.

28930169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 28930169 is about 5378.6772537493. The cubic root of 28930169 is about 306.9848832686.

The spelling of 28930169 in words is "twenty-eight million, nine hundred thirty thousand, one hundred sixty-nine".