628271 has 4 divisors (see below), whose sum is σ = 718032. Its totient is φ = 538512.

The previous prime is 628267. The next prime is 628289. The reversal of 628271 is 172826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 172826 = 2 ⋅86413.

It is a cyclic number.

It is not a de Polignac number, because 628271 - 2² = 628267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 628271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628231) 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, 44870 + ... + 44883.

It is an arithmetic number, because the mean of its divisors is an integer number (179508).

2⁶²⁸²⁷¹ is an apocalyptic number.

628271 is a deficient number, since it is larger than the sum of its proper divisors (89761).

628271 is an equidigital number, since it uses as much as digits as its factorization.

628271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89760.

The product of its digits is 1344, while the sum is 26.

The square root of 628271 is about 792.6354773791. The cubic root of 628271 is about 85.6476933829.

The spelling of 628271 in words is "six hundred twenty-eight thousand, two hundred seventy-one".