628207643 has 4 divisors (see below), whose sum is σ = 717951600. Its totient is φ = 538463688.

The previous prime is 628207637. The next prime is 628207651. The reversal of 628207643 is 346702826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346702826 = 2 ⋅173351413.

It is not a de Polignac number, because 628207643 - 2⁴ = 628207627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628207597 and 628207606.

It is not an unprimeable number, because it can be changed into a prime (628207663) 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, 44871968 + ... + 44871981.

It is an arithmetic number, because the mean of its divisors is an integer number (179487900).

Almost surely, 2^628207643 is an apocalyptic number.

628207643 is a deficient number, since it is larger than the sum of its proper divisors (89743957).

628207643 is an equidigital number, since it uses as much as digits as its factorization.

628207643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89743956.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 628207643 is about 25064.0707587574. The cubic root of 628207643 is about 856.4481428388.

The spelling of 628207643 in words is "six hundred twenty-eight million, two hundred seven thousand, six hundred forty-three".