556728319 has 4 divisors (see below), whose sum is σ = 636260944. Its totient is φ = 477195696.

The previous prime is 556728313. The next prime is 556728323. The reversal of 556728319 is 913827655.

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 556728319 - 2³ = 556728311 is a prime.

It is a super-2 number, since 2×556728319² = 619892842353131522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556728311) 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, 39766302 + ... + 39766315.

It is an arithmetic number, because the mean of its divisors is an integer number (159065236).

Almost surely, 2^556728319 is an apocalyptic number.

556728319 is a deficient number, since it is larger than the sum of its proper divisors (79532625).

556728319 is an equidigital number, since it uses as much as digits as its factorization.

556728319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79532624.

The product of its digits is 453600, while the sum is 46.

The square root of 556728319 is about 23595.0909936792. The cubic root of 556728319 is about 822.6487415579.

The spelling of 556728319 in words is "five hundred fifty-six million, seven hundred twenty-eight thousand, three hundred nineteen".