628689560 has 16 divisors (see below), whose sum is σ = 1414551600. Its totient is φ = 251475808.

The previous prime is 628689547. The next prime is 628689571. The reversal of 628689560 is 65986826.

It is a junction number, because it is equal to n+sod(n) for n = 628689499 and 628689508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7858580 + ... + 7858659.

It is an arithmetic number, because the mean of its divisors is an integer number (88409475).

Almost surely, 2^628689560 is an apocalyptic number.

It is an amenable number.

628689560 is an abundant number, since it is smaller than the sum of its proper divisors (785862040).

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

628689560 is a wasteful number, since it uses less digits than its factorization.

628689560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15717250 (or 15717246 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 628689560 is about 25073.6826174378. The cubic root of 628689560 is about 856.6670892483.

The spelling of 628689560 in words is "six hundred twenty-eight million, six hundred eighty-nine thousand, five hundred sixty".