28889169 has 8 divisors (see below), whose sum is σ = 38774592. Its totient is φ = 19131600.

The previous prime is 28889153. The next prime is 28889207. The reversal of 28889169 is 96198882.

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

It is not a de Polignac number, because 28889169 - 2⁴ = 28889153 is a prime.

It is a super-2 number, since 2×28889169² = 1669168171021122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28889129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31434 + ... + 32339.

It is an arithmetic number, because the mean of its divisors is an integer number (4846824).

Almost surely, 2^28889169 is an apocalyptic number.

It is an amenable number.

28889169 is a deficient number, since it is larger than the sum of its proper divisors (9885423).

28889169 is a wasteful number, since it uses less digits than its factorization.

28889169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63927.

The product of its digits is 497664, while the sum is 51.

The square root of 28889169 is about 5374.8645564330. The cubic root of 28889169 is about 306.8397944661.

The spelling of 28889169 in words is "twenty-eight million, eight hundred eighty-nine thousand, one hundred sixty-nine".