628986 has 8 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 209660.

The previous prime is 628973. The next prime is 628993. The reversal of 628986 is 689826.

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

628986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52410 + ... + 52421.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

2⁶²⁸⁹⁸⁶ is an apocalyptic number.

628986 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.

628986 is a wasteful number, since it uses less digits than its factorization.

628986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104836.

The product of its digits is 41472, while the sum is 39.

The square root of 628986 is about 793.0863761281. The cubic root of 628986 is about 85.6801713449.

The spelling of 628986 in words is "six hundred twenty-eight thousand, nine hundred eighty-six".