28758169 has 16 divisors (see below), whose sum is σ = 34369920. Its totient is φ = 23752960.

The previous prime is 28758167. The next prime is 28758181. The reversal of 28758169 is 96185782.

It is not a de Polignac number, because 28758169 - 2¹ = 28758167 is a prime.

It is a super-2 number, since 2×28758169² = 1654064568465122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28758167) 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 15 ways as a sum of consecutive naturals, for example, 2772 + ... + 8074.

It is an arithmetic number, because the mean of its divisors is an integer number (2148120).

Almost surely, 2^28758169 is an apocalyptic number.

28758169 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28758169 is a deficient number, since it is larger than the sum of its proper divisors (5611751).

28758169 is a wasteful number, since it uses less digits than its factorization.

28758169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360.

The product of its digits is 241920, while the sum is 46.

The square root of 28758169 is about 5362.6643564557. The cubic root of 28758169 is about 306.3752960026.

The spelling of 28758169 in words is "twenty-eight million, seven hundred fifty-eight thousand, one hundred sixty-nine".