628145773 has 4 divisors (see below), whose sum is σ = 629117280. Its totient is φ = 627174268.

The previous prime is 628145759. The next prime is 628145783. The reversal of 628145773 is 377541826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 628145773 - 2⁹ = 628145261 is a prime.

It is a super-2 number, since 2×628145773² = 789134224275535058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628145753) 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 3 ways as a sum of consecutive naturals, for example, 484783 + ... + 486076.

It is an arithmetic number, because the mean of its divisors is an integer number (157279320).

Almost surely, 2^628145773 is an apocalyptic number.

It is an amenable number.

628145773 is a deficient number, since it is larger than the sum of its proper divisors (971507).

628145773 is an equidigital number, since it uses as much as digits as its factorization.

628145773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971506.

The product of its digits is 282240, while the sum is 43.

The square root of 628145773 is about 25062.8364915067. The cubic root of 628145773 is about 856.4200257097.

The spelling of 628145773 in words is "six hundred twenty-eight million, one hundred forty-five thousand, seven hundred seventy-three".