28317149 has 6 divisors (see below), whose sum is σ = 32940414. Its totient is φ = 24271800.

The previous prime is 28317127. The next prime is 28317151. The reversal of 28317149 is 94171382.

It can be written as a sum of positive squares in only one way, i.e., 27489049 + 828100 = 5243^2 + 910^2 .

It is not a de Polignac number, because 28317149 - 2²⁰ = 27268573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28317119) 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, 288902 + ... + 288999.

It is an arithmetic number, because the mean of its divisors is an integer number (5490069).

Almost surely, 2^28317149 is an apocalyptic number.

It is an amenable number.

28317149 is a deficient number, since it is larger than the sum of its proper divisors (4623265).

28317149 is an equidigital number, since it uses as much as digits as its factorization.

28317149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577915 (or 577908 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 28317149 is about 5321.3860036648. The cubic root of 28317149 is about 304.8010850270.

The spelling of 28317149 in words is "twenty-eight million, three hundred seventeen thousand, one hundred forty-nine".