628784529 has 16 divisors (see below), whose sum is σ = 845919360. Its totient is φ = 415434240.

The previous prime is 628784509. The next prime is 628784531. The reversal of 628784529 is 925487826.

It is not a de Polignac number, because 628784529 - 2⁹ = 628784017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628784509) 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 15 ways as a sum of consecutive naturals, for example, 205249 + ... + 208289.

It is an arithmetic number, because the mean of its divisors is an integer number (52869960).

Almost surely, 2^628784529 is an apocalyptic number.

It is an amenable number.

628784529 is a deficient number, since it is larger than the sum of its proper divisors (217134831).

628784529 is a wasteful number, since it uses less digits than its factorization.

628784529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640.

The product of its digits is 1935360, while the sum is 51.

The square root of 628784529 is about 25075.5763443236. The cubic root of 628784529 is about 856.7102227362.

The spelling of 628784529 in words is "six hundred twenty-eight million, seven hundred eighty-four thousand, five hundred twenty-nine".