28113597 has 36 divisors (see below), whose sum is σ = 45468540. Its totient is φ = 16678656.

The previous prime is 28113571. The next prime is 28113601. The reversal of 28113597 is 79531182.

It can be written as a sum of positive squares in 2 ways, for example, as 22382361 + 5731236 = 4731^2 + 2394^2 .

It is not a de Polignac number, because 28113597 - 2⁸ = 28113341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28113697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54979 + ... + 55487.

It is an arithmetic number, because the mean of its divisors is an integer number (1263015).

Almost surely, 2^28113597 is an apocalyptic number.

It is an amenable number.

28113597 is a deficient number, since it is larger than the sum of its proper divisors (17354943).

28113597 is a wasteful number, since it uses less digits than its factorization.

28113597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 548 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 28113597 is about 5302.2256647563. The cubic root of 28113597 is about 304.0689947567.

The spelling of 28113597 in words is "twenty-eight million, one hundred thirteen thousand, five hundred ninety-seven".