628565539 has 4 divisors (see below), whose sum is σ = 718360624. Its totient is φ = 538770456.

The previous prime is 628565537. The next prime is 628565611. The reversal of 628565539 is 935565826.

628565539 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.

It is not a de Polignac number, because 628565539 - 2¹ = 628565537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628565492 and 628565501.

It is not an unprimeable number, because it can be changed into a prime (628565537) 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, 44897532 + ... + 44897545.

It is an arithmetic number, because the mean of its divisors is an integer number (179590156).

Almost surely, 2^628565539 is an apocalyptic number.

628565539 is a deficient number, since it is larger than the sum of its proper divisors (89795085).

628565539 is an equidigital number, since it uses as much as digits as its factorization.

628565539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89795084.

The product of its digits is 1944000, while the sum is 49.

The square root of 628565539 is about 25071.2093645281. The cubic root of 628565539 is about 856.6107542393.

It can be divided in two parts, 6285 and 65539, that added together give a square (71824 = 268²).

The spelling of 628565539 in words is "six hundred twenty-eight million, five hundred sixty-five thousand, five hundred thirty-nine".