628320522 has 16 divisors (see below), whose sum is σ = 1256890752. Its totient is φ = 209398560.

The previous prime is 628320503. The next prime is 628320547. The reversal of 628320522 is 225023826.

It is a self number, because there is not a number n which added to its sum of digits gives 628320522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45022 + ... + 57302.

It is an arithmetic number, because the mean of its divisors is an integer number (78555672).

Almost surely, 2^628320522 is an apocalyptic number.

628320522 is an abundant number, since it is smaller than the sum of its proper divisors (628570230).

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

628320522 is a wasteful number, since it uses less digits than its factorization.

628320522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20813.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 628320522 is about 25066.3224666085. The cubic root of 628320522 is about 856.4994365054.

The spelling of 628320522 in words is "six hundred twenty-eight million, three hundred twenty thousand, five hundred twenty-two".