628833228 has 12 divisors (see below), whose sum is σ = 1467277560. Its totient is φ = 209611072.

The previous prime is 628833221. The next prime is 628833229. The reversal of 628833228 is 822338826.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 628833228.

It is not an unprimeable number, because it can be changed into a prime (628833221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26201373 + ... + 26201396.

It is an arithmetic number, because the mean of its divisors is an integer number (122273130).

Almost surely, 2^628833228 is an apocalyptic number.

It is an amenable number.

628833228 is an abundant number, since it is smaller than the sum of its proper divisors (838444332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628833228 is a wasteful number, since it uses less digits than its factorization.

628833228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52402776 (or 52402774 counting only the distinct ones).

The product of its digits is 221184, while the sum is 42.

The square root of 628833228 is about 25076.5473700029. The cubic root of 628833228 is about 856.7323394032.

The spelling of 628833228 in words is "six hundred twenty-eight million, eight hundred thirty-three thousand, two hundred twenty-eight".