556728289 has 8 divisors (see below), whose sum is σ = 600913152. Its totient is φ = 512737680.

The previous prime is 556728269. The next prime is 556728311. The reversal of 556728289 is 982827655.

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

It is not a de Polignac number, because 556728289 - 2⁹ = 556727777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556728209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42577 + ... + 54094.

It is an arithmetic number, because the mean of its divisors is an integer number (75114144).

Almost surely, 2^556728289 is an apocalyptic number.

It is an amenable number.

556728289 is a deficient number, since it is larger than the sum of its proper divisors (44184863).

556728289 is a wasteful number, since it uses less digits than its factorization.

556728289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97127.

The product of its digits is 2419200, while the sum is 52.

The square root of 556728289 is about 23595.0903579537. The cubic root of 556728289 is about 822.6487267814.

It can be divided in two parts, 5567 and 28289, that added together give a square (33856 = 184²).

The spelling of 556728289 in words is "five hundred fifty-six million, seven hundred twenty-eight thousand, two hundred eighty-nine".