628585108538 has 4 divisors (see below), whose sum is σ = 942877662810. Its totient is φ = 314292554268.

The previous prime is 628585108531. The next prime is 628585108553. The reversal of 628585108538 is 835801585826.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 381791759449 + 246793349089 = 617893^2 + 496783^2 .

It is not an unprimeable number, because it can be changed into a prime (628585108531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157146277133 + ... + 157146277136.

Almost surely, 2^628585108538 is an apocalyptic number.

628585108538 is a deficient number, since it is larger than the sum of its proper divisors (314292554272).

628585108538 is a wasteful number, since it uses less digits than its factorization.

628585108538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314292554271.

The product of its (nonzero) digits is 18432000, while the sum is 59.

The spelling of 628585108538 in words is "six hundred twenty-eight billion, five hundred eighty-five million, one hundred eight thousand, five hundred thirty-eight".