518828869 has 4 divisors (see below), whose sum is σ = 558738796. Its totient is φ = 478918944.

The previous prime is 518828867. The next prime is 518828873. The reversal of 518828869 is 968828815.

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

It can be written as a sum of positive squares in 2 ways, for example, as 146724769 + 372104100 = 12113^2 + 19290^2 .

It is a cyclic number.

It is not a de Polignac number, because 518828869 - 2¹ = 518828867 is a prime.

It is a super-2 number, since 2×518828869² = 538366790615638322, 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 (518828867) 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, 19954944 + ... + 19954969.

It is an arithmetic number, because the mean of its divisors is an integer number (139684699).

Almost surely, 2^518828869 is an apocalyptic number.

It is an amenable number.

518828869 is a deficient number, since it is larger than the sum of its proper divisors (39909927).

518828869 is a wasteful number, since it uses less digits than its factorization.

518828869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39909926.

The product of its digits is 2211840, while the sum is 55.

The square root of 518828869 is about 22777.8152815409. The cubic root of 518828869 is about 803.5410060743.

The spelling of 518828869 in words is "five hundred eighteen million, eight hundred twenty-eight thousand, eight hundred sixty-nine".