628108881 has 8 divisors (see below), whose sum is σ = 838725600. Its totient is φ = 418115712.

The previous prime is 628108847. The next prime is 628108919. The reversal of 628108881 is 188801826.

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

It is not a de Polignac number, because 628108881 - 2⁷ = 628108753 is a prime.

It is a super-2 number, since 2×628108881² = 789041532782144322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (628108841) 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, 153531 + ... + 157568.

It is an arithmetic number, because the mean of its divisors is an integer number (104840700).

Almost surely, 2^628108881 is an apocalyptic number.

It is an amenable number.

628108881 is a deficient number, since it is larger than the sum of its proper divisors (210616719).

628108881 is a wasteful number, since it uses less digits than its factorization.

628108881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311775.

The product of its (nonzero) digits is 49152, while the sum is 42.

The square root of 628108881 is about 25062.1004905814. The cubic root of 628108881 is about 856.4032590782.

The spelling of 628108881 in words is "six hundred twenty-eight million, one hundred eight thousand, eight hundred eighty-one".