628640013 has 8 divisors (see below), whose sum is σ = 838336576. Its totient is φ = 419018400.

The previous prime is 628639987. The next prime is 628640017. The reversal of 628640013 is 310046826.

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

It is not a de Polignac number, because 628640013 - 2¹³ = 628631821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628640017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5208 + ... + 35838.

It is an arithmetic number, because the mean of its divisors is an integer number (104792072).

Almost surely, 2^628640013 is an apocalyptic number.

It is an amenable number.

628640013 is a deficient number, since it is larger than the sum of its proper divisors (209696563).

628640013 is a wasteful number, since it uses less digits than its factorization.

628640013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37475.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 628640013 is about 25072.6945699899. The cubic root of 628640013 is about 856.6445840237.

Adding to 628640013 its reverse (310046826), we get a palindrome (938686839).

The spelling of 628640013 in words is "six hundred twenty-eight million, six hundred forty thousand, thirteen".