28397559 has 8 divisors (see below), whose sum is σ = 38578032. Its totient is φ = 18574400.

The previous prime is 28397557. The next prime is 28397573. The reversal of 28397559 is 95579382.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28397559 - 2¹ = 28397557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28397557) 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 7 ways as a sum of consecutive naturals, for example, 89142 + ... + 89459.

It is an arithmetic number, because the mean of its divisors is an integer number (4822254).

Almost surely, 2^28397559 is an apocalyptic number.

28397559 is a deficient number, since it is larger than the sum of its proper divisors (10180473).

28397559 is a wasteful number, since it uses less digits than its factorization.

28397559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178657.

The product of its digits is 680400, while the sum is 48.

The square root of 28397559 is about 5328.9360101243. The cubic root of 28397559 is about 305.0893189986.

The spelling of 28397559 in words is "twenty-eight million, three hundred ninety-seven thousand, five hundred fifty-nine".