628071 has 4 divisors (see below), whose sum is σ = 837432. Its totient is φ = 418712.

The previous prime is 628063. The next prime is 628093. The reversal of 628071 is 170826.

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 628071 - 2³ = 628063 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628071.

It is not an unprimeable number, because it can be changed into a prime (628021) 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, 104676 + ... + 104681.

It is an arithmetic number, because the mean of its divisors is an integer number (209358).

2⁶²⁸⁰⁷¹ is an apocalyptic number.

628071 is a deficient number, since it is larger than the sum of its proper divisors (209361).

628071 is a wasteful number, since it uses less digits than its factorization.

628071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209360.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 628071 is about 792.5093059391. The cubic root of 628071 is about 85.6386042284.

Adding to 628071 its reverse (170826), we get a palindrome (798897).

The spelling of 628071 in words is "six hundred twenty-eight thousand, seventy-one".