628866591238 has 16 divisors (see below), whose sum is σ = 984588823296. Its totient is φ = 300677980680.

The previous prime is 628866591229. The next prime is 628866591251. The reversal of 628866591238 is 832195668826.

It is a self number, because there is not a number n which added to its sum of digits gives 628866591238.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749906 + ... + 2078437.

It is an arithmetic number, because the mean of its divisors is an integer number (61536801456).

Almost surely, 2^628866591238 is an apocalyptic number.

628866591238 is a deficient number, since it is larger than the sum of its proper divisors (355722232058).

628866591238 is a wasteful number, since it uses less digits than its factorization.

628866591238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3831939.

The product of its digits is 59719680, while the sum is 64.

The spelling of 628866591238 in words is "six hundred twenty-eight billion, eight hundred sixty-six million, five hundred ninety-one thousand, two hundred thirty-eight".