628859 has 8 divisors (see below), whose sum is σ = 784128. Its totient is φ = 489960.

The previous prime is 628841. The next prime is 628861. The reversal of 628859 is 958826.

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

It is a cyclic number.

It is not a de Polignac number, because 628859 - 2¹² = 624763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628819) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4007 + ... + 4160.

It is an arithmetic number, because the mean of its divisors is an integer number (98016).

2⁶²⁸⁸⁵⁹ is an apocalyptic number.

628859 is a deficient number, since it is larger than the sum of its proper divisors (155269).

628859 is a wasteful number, since it uses less digits than its factorization.

628859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8185.

The product of its digits is 34560, while the sum is 38.

The square root of 628859 is about 793.0063051452. The cubic root of 628859 is about 85.6744043304.

The spelling of 628859 in words is "six hundred twenty-eight thousand, eight hundred fifty-nine".