628566913 has 16 divisors (see below), whose sum is σ = 683665920. Its totient is φ = 574464384.

The previous prime is 628566889. The next prime is 628566919. The reversal of 628566913 is 319665826.

628566913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 628566913 - 2⁹ = 628566401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628566919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727920 + ... + 728782.

It is an arithmetic number, because the mean of its divisors is an integer number (42729120).

Almost surely, 2^628566913 is an apocalyptic number.

It is an amenable number.

628566913 is a deficient number, since it is larger than the sum of its proper divisors (55099007).

628566913 is a wasteful number, since it uses less digits than its factorization.

628566913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368.

The product of its digits is 466560, while the sum is 46.

The square root of 628566913 is about 25071.2367664621. The cubic root of 628566913 is about 856.6113784025.

The spelling of 628566913 in words is "six hundred twenty-eight million, five hundred sixty-six thousand, nine hundred thirteen".