628553 has 4 divisors (see below), whose sum is σ = 630468. Its totient is φ = 626640.

The previous prime is 628547. The next prime is 628561. The reversal of 628553 is 355826.

628553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355826 = 2 ⋅177913.

It can be written as a sum of positive squares in 2 ways, for example, as 222784 + 405769 = 472^2 + 637^2 .

It is a cyclic number.

It is not a de Polignac number, because 628553 - 2¹⁴ = 612169 is a prime.

It is a d-powerful number, because it can be written as 6⁷ + 2¹⁶ + 5⁵ + 8⁶ + 5⁶ + 3⁷ .

It is a Duffinian number.

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, 326 + ... + 1167.

It is an arithmetic number, because the mean of its divisors is an integer number (157617).

2⁶²⁸⁵⁵³ is an apocalyptic number.

It is an amenable number.

628553 is a deficient number, since it is larger than the sum of its proper divisors (1915).

628553 is a wasteful number, since it uses less digits than its factorization.

628553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914.

The product of its digits is 7200, while the sum is 29.

The square root of 628553 is about 792.8133449936. The cubic root of 628553 is about 85.6605058141.

The spelling of 628553 in words is "six hundred twenty-eight thousand, five hundred fifty-three".