628968226 has 4 divisors (see below), whose sum is σ = 943452342. Its totient is φ = 314484112.

The previous prime is 628968203. The next prime is 628968247. The reversal of 628968226 is 622869826.

It is a happy number.

628968226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 602948025 + 26020201 = 24555^2 + 5101^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 628968226.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157242055 + ... + 157242058.

Almost surely, 2^628968226 is an apocalyptic number.

628968226 is a deficient number, since it is larger than the sum of its proper divisors (314484116).

628968226 is a wasteful number, since it uses less digits than its factorization.

628968226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314484115.

The product of its digits is 995328, while the sum is 49.

The square root of 628968226 is about 25079.2389437957. The cubic root of 628968226 is about 856.7936428203.

The spelling of 628968226 in words is "six hundred twenty-eight million, nine hundred sixty-eight thousand, two hundred twenty-six".