628985308 has 24 divisors (see below), whose sum is σ = 1275692544. Its totient is φ = 265767600.

The previous prime is 628985299. The next prime is 628985327. The reversal of 628985308 is 803589826.

It is a congruent number.

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, 156208 + ... + 160183.

It is an arithmetic number, because the mean of its divisors is an integer number (53153856).

Almost surely, 2^628985308 is an apocalyptic number.

It is an amenable number.

628985308 is an abundant number, since it is smaller than the sum of its proper divisors (646707236).

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

628985308 is a wasteful number, since it uses less digits than its factorization.

628985308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316473 (or 316471 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The square root of 628985308 is about 25079.5795020570. The cubic root of 628985308 is about 856.8013992357.

The spelling of 628985308 in words is "six hundred twenty-eight million, nine hundred eighty-five thousand, three hundred eight".