628508818 has 16 divisors (see below), whose sum is σ = 1112200704. Its totient is φ = 260671680.

The previous prime is 628508789. The next prime is 628508831. The reversal of 628508818 is 818805826.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723655 + ... + 724522.

It is an arithmetic number, because the mean of its divisors is an integer number (69512544).

Almost surely, 2^628508818 is an apocalyptic number.

628508818 is a deficient number, since it is larger than the sum of its proper divisors (483691886).

628508818 is a wasteful number, since it uses less digits than its factorization.

628508818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448217.

The product of its (nonzero) digits is 245760, while the sum is 46.

The square root of 628508818 is about 25070.0781410828. The cubic root of 628508818 is about 856.5849869554.

The spelling of 628508818 in words is "six hundred twenty-eight million, five hundred eight thousand, eight hundred eighteen".