628518489 has 8 divisors (see below), whose sum is σ = 838249152. Its totient is φ = 418900080.

The previous prime is 628518469. The next prime is 628518511. The reversal of 628518489 is 984815826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 628518489 - 2¹³ = 628510297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628518439) 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 7 ways as a sum of consecutive naturals, for example, 13989 + ... + 38114.

It is an arithmetic number, because the mean of its divisors is an integer number (104781144).

Almost surely, 2^628518489 is an apocalyptic number.

It is an amenable number.

628518489 is a deficient number, since it is larger than the sum of its proper divisors (209730663).

628518489 is a wasteful number, since it uses less digits than its factorization.

628518489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56127.

The product of its digits is 1105920, while the sum is 51.

The square root of 628518489 is about 25070.2710196759. The cubic root of 628518489 is about 856.5893804185.

The spelling of 628518489 in words is "six hundred twenty-eight million, five hundred eighteen thousand, four hundred eighty-nine".