628597 has 4 divisors (see below), whose sum is σ = 631116. Its totient is φ = 626080.

The previous prime is 628591. The next prime is 628651. The reversal of 628597 is 795826.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 463761 + 164836 = 681^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 628597 - 2¹⁹ = 104309 is a prime.

It is a Duffinian number.

628597 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628591) 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, 838 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (157779).

2⁶²⁸⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

628597 is a deficient number, since it is larger than the sum of its proper divisors (2519).

628597 is a wasteful number, since it uses less digits than its factorization.

628597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518.

The product of its digits is 30240, while the sum is 37.

The square root of 628597 is about 792.8410937887. The cubic root of 628597 is about 85.6625045712.

It can be divided in two parts, 628 and 597, that added together give a triangular number (1225 = T₄₉).

The spelling of 628597 in words is "six hundred twenty-eight thousand, five hundred ninety-seven".