628458 has 8 divisors (see below), whose sum is σ = 1256928. Its totient is φ = 209484.

The previous prime is 628447. The next prime is 628477. The reversal of 628458 is 854826.

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

628458 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

628458 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 52366 + ... + 52377.

It is an arithmetic number, because the mean of its divisors is an integer number (157116).

2⁶²⁸⁴⁵⁸ is an apocalyptic number.

628458 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.

628458 is a wasteful number, since it uses less digits than its factorization.

628458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104748.

The product of its digits is 15360, while the sum is 33.

The square root of 628458 is about 792.7534295101. The cubic root of 628458 is about 85.6561899977.

The spelling of 628458 in words is "six hundred twenty-eight thousand, four hundred fifty-eight".