628674911 has 4 divisors (see below), whose sum is σ = 631444632. Its totient is φ = 625905192.

The previous prime is 628674889. The next prime is 628674953. The reversal of 628674911 is 119476826.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628674911 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 (628673911) 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 3 ways as a sum of consecutive naturals, for example, 1384520 + ... + 1384973.

It is an arithmetic number, because the mean of its divisors is an integer number (157861158).

Almost surely, 2^628674911 is an apocalyptic number.

628674911 is a deficient number, since it is larger than the sum of its proper divisors (2769721).

628674911 is a wasteful number, since it uses less digits than its factorization.

628674911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769720.

The product of its digits is 145152, while the sum is 44.

The square root of 628674911 is about 25073.3904966999. The cubic root of 628674911 is about 856.6604355067.

The spelling of 628674911 in words is "six hundred twenty-eight million, six hundred seventy-four thousand, nine hundred eleven".