628128166 has 4 divisors (see below), whose sum is σ = 942192252. Its totient is φ = 314064082.

The previous prime is 628128119. The next prime is 628128167. The reversal of 628128166 is 661821826.

628128166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628128167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157032040 + ... + 157032043.

It is an arithmetic number, because the mean of its divisors is an integer number (235548063).

Almost surely, 2^628128166 is an apocalyptic number.

628128166 is a deficient number, since it is larger than the sum of its proper divisors (314064086).

628128166 is a wasteful number, since it uses less digits than its factorization.

628128166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314064085.

The product of its digits is 55296, while the sum is 40.

The square root of 628128166 is about 25062.4852319158. The cubic root of 628128166 is about 856.4120237835.

The spelling of 628128166 in words is "six hundred twenty-eight million, one hundred twenty-eight thousand, one hundred sixty-six".