628717566 has 8 divisors (see below), whose sum is σ = 1257435144. Its totient is φ = 209572520.

The previous prime is 628717553. The next prime is 628717589. The reversal of 628717566 is 665717826.

It is a sphenic number, since it is the product of 3 distinct primes.

628717566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52393125 + ... + 52393136.

It is an arithmetic number, because the mean of its divisors is an integer number (157179393).

Almost surely, 2^628717566 is an apocalyptic number.

628717566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

628717566 is a wasteful number, since it uses less digits than its factorization.

628717566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104786266.

The product of its digits is 846720, while the sum is 48.

The square root of 628717566 is about 25074.2410852253. The cubic root of 628717566 is about 856.6798096029.

The spelling of 628717566 in words is "six hundred twenty-eight million, seven hundred seventeen thousand, five hundred sixty-six".