28331169 has 8 divisors (see below), whose sum is σ = 37937952. Its totient is φ = 18805920.

The previous prime is 28331143. The next prime is 28331209. The reversal of 28331169 is 96113382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28331169 - 2¹⁷ = 28200097 is a prime.

It is a super-2 number, since 2×28331169² = 1605310273813122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28331669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19567 + ... + 20964.

It is an arithmetic number, because the mean of its divisors is an integer number (4742244).

Almost surely, 2^28331169 is an apocalyptic number.

It is an amenable number.

28331169 is a deficient number, since it is larger than the sum of its proper divisors (9606783).

28331169 is a wasteful number, since it uses less digits than its factorization.

28331169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40767.

The product of its digits is 7776, while the sum is 33.

The square root of 28331169 is about 5322.7031666250. The cubic root of 28331169 is about 304.8513797107.

The spelling of 28331169 in words is "twenty-eight million, three hundred thirty-one thousand, one hundred sixty-nine".