628513 has 4 divisors (see below), whose sum is σ = 631060. Its totient is φ = 625968.

The previous prime is 628499. The next prime is 628547. The reversal of 628513 is 315826.

It is a happy number.

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 61504 + 567009 = 248^2 + 753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628513 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (628583) 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, 858 + ... + 1411.

It is an arithmetic number, because the mean of its divisors is an integer number (157765).

2⁶²⁸⁵¹³ is an apocalyptic number.

It is an amenable number.

628513 is a deficient number, since it is larger than the sum of its proper divisors (2547).

628513 is a wasteful number, since it uses less digits than its factorization.

628513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546.

The product of its digits is 1440, while the sum is 25.

The square root of 628513 is about 792.7881179735. The cubic root of 628513 is about 85.6586886812.

The spelling of 628513 in words is "six hundred twenty-eight thousand, five hundred thirteen".