28996559 has 4 divisors (see below), whose sum is σ = 29174616. Its totient is φ = 28818504.

The previous prime is 28996531. The next prime is 28996571. The reversal of 28996559 is 95569982.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28996559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28996559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28996519) 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 3 ways as a sum of consecutive naturals, for example, 88784 + ... + 89109.

It is an arithmetic number, because the mean of its divisors is an integer number (7293654).

Almost surely, 2^28996559 is an apocalyptic number.

28996559 is a deficient number, since it is larger than the sum of its proper divisors (178057).

28996559 is a wasteful number, since it uses less digits than its factorization.

28996559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178056.

The product of its digits is 1749600, while the sum is 53.

The square root of 28996559 is about 5384.8453088274. The cubic root of 28996559 is about 307.2195305452.

The spelling of 28996559 in words is "twenty-eight million, nine hundred ninety-six thousand, five hundred fifty-nine".