28494169 has 6 divisors (see below), whose sum is σ = 31320170. Its totient is φ = 25903680.

The previous prime is 28494161. The next prime is 28494187. The reversal of 28494169 is 96149482.

It can be written as a sum of positive squares in only one way, i.e., 17015625 + 11478544 = 4125^2 + 3388^2 .

It is not a de Polignac number, because 28494169 - 2³ = 28494161 is a prime.

It is a super-2 number, since 2×28494169² = 1623835334001122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28494161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117624 + ... + 117865.

Almost surely, 2^28494169 is an apocalyptic number.

It is an amenable number.

28494169 is a deficient number, since it is larger than the sum of its proper divisors (2826001).

28494169 is a wasteful number, since it uses less digits than its factorization.

28494169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235511 (or 235500 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 28494169 is about 5337.9929748923. The cubic root of 28494169 is about 305.4349040696.

The spelling of 28494169 in words is "twenty-eight million, four hundred ninety-four thousand, one hundred sixty-nine".