516779728 has 10 divisors (see below), whose sum is σ = 1001260754. Its totient is φ = 258389856.

The previous prime is 516779707. The next prime is 516779729. The reversal of 516779728 is 827977615.

It can be written as a sum of positive squares in only one way, i.e., 515834944 + 944784 = 22712^2 + 972^2 .

It is a super-2 number, since 2×516779728² = 534122574543507968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516779729) 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 as a sum of consecutive naturals, namely, 16149351 + ... + 16149382.

Almost surely, 2^516779728 is an apocalyptic number.

It is an amenable number.

516779728 is a deficient number, since it is larger than the sum of its proper divisors (484481026).

516779728 is a wasteful number, since it uses less digits than its factorization.

516779728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32298741 (or 32298735 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 52.

The square root of 516779728 is about 22732.7897100202. The cubic root of 516779728 is about 802.4817349453.

The spelling of 516779728 in words is "five hundred sixteen million, seven hundred seventy-nine thousand, seven hundred twenty-eight".