518442728 has 8 divisors (see below), whose sum is σ = 972080130. Its totient is φ = 259221360.

The previous prime is 518442719. The next prime is 518442763. The reversal of 518442728 is 827244815.

It can be written as a sum of positive squares in only one way, i.e., 518108644 + 334084 = 22762^2 + 578^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32402663 + ... + 32402678.

Almost surely, 2^518442728 is an apocalyptic number.

It is an amenable number.

518442728 is a deficient number, since it is larger than the sum of its proper divisors (453637402).

518442728 is a wasteful number, since it uses less digits than its factorization.

518442728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64805347 (or 64805343 counting only the distinct ones).

The product of its digits is 143360, while the sum is 41.

The square root of 518442728 is about 22769.3374519330. The cubic root of 518442728 is about 803.3416101181.

The spelling of 518442728 in words is "five hundred eighteen million, four hundred forty-two thousand, seven hundred twenty-eight".