628962009 has 16 divisors (see below), whose sum is σ = 903891072. Its totient is φ = 386725248.

The previous prime is 628961999. The next prime is 628962013. The reversal of 628962009 is 900269826.

It is not a de Polignac number, because 628962009 - 2¹² = 628957913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628962029) 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, 44629 + ... + 57005.

It is an arithmetic number, because the mean of its divisors is an integer number (56493192).

Almost surely, 2^628962009 is an apocalyptic number.

It is an amenable number.

628962009 is a deficient number, since it is larger than the sum of its proper divisors (274929063).

628962009 is a wasteful number, since it uses less digits than its factorization.

628962009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13696.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 628962009 is about 25079.1149963471. The cubic root of 628962009 is about 856.7908198353.

The spelling of 628962009 in words is "six hundred twenty-eight million, nine hundred sixty-two thousand, nine".