628297 has 4 divisors (see below), whose sum is σ = 645316. Its totient is φ = 611280.

The previous prime is 628289. The next prime is 628301. The reversal of 628297 is 792826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 792826 = 2 ⋅396413.

It can be written as a sum of positive squares in 2 ways, for example, as 594441 + 33856 = 771^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 628297 - 2³ = 628289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628207) 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, 8454 + ... + 8527.

It is an arithmetic number, because the mean of its divisors is an integer number (161329).

2⁶²⁸²⁹⁷ is an apocalyptic number.

It is an amenable number.

628297 is a deficient number, since it is larger than the sum of its proper divisors (17019).

628297 is a wasteful number, since it uses less digits than its factorization.

628297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17018.

The product of its digits is 12096, while the sum is 34.

The square root of 628297 is about 792.6518781912. The cubic root of 628297 is about 85.6488748313.

The spelling of 628297 in words is "six hundred twenty-eight thousand, two hundred ninety-seven".