628123287 has 8 divisors (see below), whose sum is σ = 913633920. Its totient is φ = 380680760.

The previous prime is 628123247. The next prime is 628123289. The reversal of 628123287 is 782321826.

628123287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 628123287 - 2¹¹ = 628121239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628123289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9516987 + ... + 9517052.

It is an arithmetic number, because the mean of its divisors is an integer number (114204240).

Almost surely, 2^628123287 is an apocalyptic number.

628123287 is a deficient number, since it is larger than the sum of its proper divisors (285510633).

628123287 is a wasteful number, since it uses less digits than its factorization.

628123287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19034053.

The product of its digits is 64512, while the sum is 39.

The square root of 628123287 is about 25062.3878950111. The cubic root of 628123287 is about 856.4098063777.

The spelling of 628123287 in words is "six hundred twenty-eight million, one hundred twenty-three thousand, two hundred eighty-seven".