28597559 has 4 divisors (see below), whose sum is σ = 29370504. Its totient is φ = 27824616.

The previous prime is 28597529. The next prime is 28597561. The reversal of 28597559 is 95579582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28597559 - 2¹² = 28593463 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 (28597529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386417 + ... + 386490.

It is an arithmetic number, because the mean of its divisors is an integer number (7342626).

Almost surely, 2^28597559 is an apocalyptic number.

28597559 is a deficient number, since it is larger than the sum of its proper divisors (772945).

28597559 is an equidigital number, since it uses as much as digits as its factorization.

28597559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772944.

The product of its digits is 1134000, while the sum is 50.

The square root of 28597559 is about 5347.6685574183. The cubic root of 28597559 is about 305.8038777737.

The spelling of 28597559 in words is "twenty-eight million, five hundred ninety-seven thousand, five hundred fifty-nine".