628228852 has 6 divisors (see below), whose sum is σ = 1099400498. Its totient is φ = 314114424.

The previous prime is 628228847. The next prime is 628228859. The reversal of 628228852 is 258822826.

It can be written as a sum of positive squares in only one way, i.e., 626701156 + 1527696 = 25034^2 + 1236^2 .

It is a junction number, because it is equal to n+sod(n) for n = 628228799 and 628228808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628228859) by changing a digit.

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 as a sum of consecutive naturals, namely, 78528603 + ... + 78528610.

Almost surely, 2^628228852 is an apocalyptic number.

It is an amenable number.

628228852 is a deficient number, since it is larger than the sum of its proper divisors (471171646).

628228852 is a wasteful number, since it uses less digits than its factorization.

628228852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157057217 (or 157057215 counting only the distinct ones).

The product of its digits is 245760, while the sum is 43.

The square root of 628228852 is about 25064.4938508640. The cubic root of 628228852 is about 856.4577809494.

The spelling of 628228852 in words is "six hundred twenty-eight million, two hundred twenty-eight thousand, eight hundred fifty-two".