628885986 has 16 divisors (see below), whose sum is σ = 1276545504. Its totient is φ = 206499744.

The previous prime is 628885949. The next prime is 628885993. The reversal of 628885986 is 689588826.

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, 781795 + ... + 782598.

It is an arithmetic number, because the mean of its divisors is an integer number (79784094).

Almost surely, 2^628885986 is an apocalyptic number.

628885986 is an abundant number, since it is smaller than the sum of its proper divisors (647659518).

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

628885986 is a wasteful number, since it uses less digits than its factorization.

628885986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564465.

The product of its digits is 13271040, while the sum is 60.

The square root of 628885986 is about 25077.5992870131. The cubic root of 628885986 is about 856.7562981779.

The spelling of 628885986 in words is "six hundred twenty-eight million, eight hundred eighty-five thousand, nine hundred eighty-six".