628143 has 4 divisors (see below), whose sum is σ = 837528. Its totient is φ = 418760.

The previous prime is 628139. The next prime is 628171. The reversal of 628143 is 341826.

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 628143 - 2² = 628139 is a prime.

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 628143.

It is not an unprimeable number, because it can be changed into a prime (628183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104688 + ... + 104693.

It is an arithmetic number, because the mean of its divisors is an integer number (209382).

2⁶²⁸¹⁴³ is an apocalyptic number.

628143 is a deficient number, since it is larger than the sum of its proper divisors (209385).

628143 is a wasteful number, since it uses less digits than its factorization.

628143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209384.

The product of its digits is 1152, while the sum is 24.

The square root of 628143 is about 792.5547299714. The cubic root of 628143 is about 85.6418765463.

Adding to 628143 its reverse (341826), we get a palindrome (969969).

The spelling of 628143 in words is "six hundred twenty-eight thousand, one hundred forty-three".