628289173 has 8 divisors (see below), whose sum is σ = 637886808. Its totient is φ = 618718464.

The previous prime is 628289161. The next prime is 628289177. The reversal of 628289173 is 371982826.

It can be written as a sum of positive squares in 4 ways, for example, as 477072964 + 151216209 = 21842^2 + 12297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628289173 - 2⁵ = 628289141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628289177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43065 + ... + 55777.

It is an arithmetic number, because the mean of its divisors is an integer number (79735851).

Almost surely, 2^628289173 is an apocalyptic number.

It is an amenable number.

628289173 is a deficient number, since it is larger than the sum of its proper divisors (9597635).

628289173 is a wasteful number, since it uses less digits than its factorization.

628289173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13463.

The product of its digits is 290304, while the sum is 46.

The square root of 628289173 is about 25065.6971377219. The cubic root of 628289173 is about 856.4851917336.

The spelling of 628289173 in words is "six hundred twenty-eight million, two hundred eighty-nine thousand, one hundred seventy-three".