628711 has 8 divisors (see below), whose sum is σ = 687744. Its totient is φ = 572160.

The previous prime is 628709. The next prime is 628721. The reversal of 628711 is 117826.

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 628711 - 2¹ = 628709 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70 + ... + 1123.

It is an arithmetic number, because the mean of its divisors is an integer number (85968).

2⁶²⁸⁷¹¹ is an apocalyptic number.

628711 is a deficient number, since it is larger than the sum of its proper divisors (59033).

628711 is a wasteful number, since it uses less digits than its factorization.

628711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241.

The product of its digits is 672, while the sum is 25.

The square root of 628711 is about 792.9129838765. The cubic root of 628711 is about 85.6676827353.

The spelling of 628711 in words is "six hundred twenty-eight thousand, seven hundred eleven".