628649876 has 12 divisors (see below), whose sum is σ = 1100335572. Its totient is φ = 314268288.

The previous prime is 628649821. The next prime is 628649887. The reversal of 628649876 is 678946826.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 476374276 + 152275600 = 21826^2 + 12340^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19916 + ... + 40668.

It is an arithmetic number, because the mean of its divisors is an integer number (91694631).

Almost surely, 2^628649876 is an apocalyptic number.

It is an amenable number.

628649876 is a deficient number, since it is larger than the sum of its proper divisors (471685696).

628649876 is a wasteful number, since it uses less digits than its factorization.

628649876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28330 (or 28328 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 56.

The square root of 628649876 is about 25072.8912572922. The cubic root of 628649876 is about 856.6490640871.

The spelling of 628649876 in words is "six hundred twenty-eight million, six hundred forty-nine thousand, eight hundred seventy-six".