628422164 has 6 divisors (see below), whose sum is σ = 1099738794. Its totient is φ = 314211080.

The previous prime is 628422161. The next prime is 628422181. The reversal of 628422164 is 461224826.

628422164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 329132164 + 299290000 = 18142^2 + 17300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628422161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78552767 + ... + 78552774.

It is an arithmetic number, because the mean of its divisors is an integer number (183289799).

Almost surely, 2^628422164 is an apocalyptic number.

It is an amenable number.

628422164 is a deficient number, since it is larger than the sum of its proper divisors (471316630).

628422164 is a wasteful number, since it uses less digits than its factorization.

628422164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157105545 (or 157105543 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 628422164 is about 25068.3498459711. The cubic root of 628422164 is about 856.5456186788.

The spelling of 628422164 in words is "six hundred twenty-eight million, four hundred twenty-two thousand, one hundred sixty-four".