28319301 has 20 divisors (see below), whose sum is σ = 42477292. Its totient is φ = 18802368.

The previous prime is 28319299. The next prime is 28319303. The reversal of 28319301 is 10391382.

It is an interprime number because it is at equal distance from previous prime (28319299) and next prime (28319303).

It can be written as a sum of positive squares in 2 ways, for example, as 599076 + 27720225 = 774^2 + 5265^2 .

It is not a de Polignac number, because 28319301 - 2¹ = 28319299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28319303) 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 19 ways as a sum of consecutive naturals, for example, 24795 + ... + 25911.

Almost surely, 2^28319301 is an apocalyptic number.

It is an amenable number.

28319301 is a deficient number, since it is larger than the sum of its proper divisors (14157991).

28319301 is a wasteful number, since it uses less digits than its factorization.

28319301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442 (or 1433 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 28319301 is about 5321.5882027831. The cubic root of 28319301 is about 304.8088060882.

The spelling of 28319301 in words is "twenty-eight million, three hundred nineteen thousand, three hundred one".