628822220 has 24 divisors (see below), whose sum is σ = 1422106224. Its totient is φ = 232180416.

The previous prime is 628822189. The next prime is 628822223. The reversal of 628822220 is 22228826.

It is not an unprimeable number, because it can be changed into a prime (628822223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209014 + ... + 1209533.

It is an arithmetic number, because the mean of its divisors is an integer number (59254426).

Almost surely, 2^628822220 is an apocalyptic number.

It is an amenable number.

628822220 is an abundant number, since it is smaller than the sum of its proper divisors (793284004).

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

628822220 is a wasteful number, since it uses less digits than its factorization.

628822220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2418569 (or 2418567 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 628822220 is about 25076.3278810914. The cubic root of 628822220 is about 856.7273402163.

The spelling of 628822220 in words is "six hundred twenty-eight million, eight hundred twenty-two thousand, two hundred twenty".