628468816 has 10 divisors (see below), whose sum is σ = 1217658362. Its totient is φ = 314234400.

The previous prime is 628468811. The next prime is 628468829. The reversal of 628468816 is 618864826.

It can be written as a sum of positive squares in only one way, i.e., 536385600 + 92083216 = 23160^2 + 9596^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 628468816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628468811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19639635 + ... + 19639666.

Almost surely, 2^628468816 is an apocalyptic number.

It is an amenable number.

628468816 is a deficient number, since it is larger than the sum of its proper divisors (589189546).

628468816 is a wasteful number, since it uses less digits than its factorization.

628468816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39279309 (or 39279303 counting only the distinct ones).

The product of its digits is 884736, while the sum is 49.

The square root of 628468816 is about 25069.2803247321. The cubic root of 628468816 is about 856.5668138666.

The spelling of 628468816 in words is "six hundred twenty-eight million, four hundred sixty-eight thousand, eight hundred sixteen".