628716220 has 24 divisors (see below), whose sum is σ = 1440332208. Its totient is φ = 228624000.

The previous prime is 628716217. The next prime is 628716233. The reversal of 628716220 is 22617826.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428681 + ... + 1429120.

It is an arithmetic number, because the mean of its divisors is an integer number (60013842).

Almost surely, 2^628716220 is an apocalyptic number.

It is an amenable number.

628716220 is an abundant number, since it is smaller than the sum of its proper divisors (811615988).

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

628716220 is a wasteful number, since it uses less digits than its factorization.

628716220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857821 (or 2857819 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 628716220 is about 25074.2142449170. The cubic root of 628716220 is about 856.6791982569.

The spelling of 628716220 in words is "six hundred twenty-eight million, seven hundred sixteen thousand, two hundred twenty".