628135 has 4 divisors (see below), whose sum is σ = 753768. Its totient is φ = 502504.

The previous prime is 628127. The next prime is 628139. The reversal of 628135 is 531826.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628135 - 2³ = 628127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628139) 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 3 ways as a sum of consecutive naturals, for example, 62809 + ... + 62818.

It is an arithmetic number, because the mean of its divisors is an integer number (188442).

2⁶²⁸¹³⁵ is an apocalyptic number.

628135 is a deficient number, since it is larger than the sum of its proper divisors (125633).

628135 is a wasteful number, since it uses less digits than its factorization.

628135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125632.

The product of its digits is 1440, while the sum is 25.

The square root of 628135 is about 792.5496829852. The cubic root of 628135 is about 85.6415129678.

The spelling of 628135 in words is "six hundred twenty-eight thousand, one hundred thirty-five".