628711138 has 16 divisors (see below), whose sum is σ = 1053894240. Its totient is φ = 278807200.

The previous prime is 628711129. The next prime is 628711169. The reversal of 628711138 is 831117826.

It is a junction number, because it is equal to n+sod(n) for n = 628711097 and 628711106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347608 + ... + 349411.

It is an arithmetic number, because the mean of its divisors is an integer number (65868390).

Almost surely, 2^628711138 is an apocalyptic number.

628711138 is a deficient number, since it is larger than the sum of its proper divisors (425183102).

628711138 is a wasteful number, since it uses less digits than its factorization.

628711138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697073.

The product of its digits is 16128, while the sum is 37.

The square root of 628711138 is about 25074.1129055446. The cubic root of 628711138 is about 856.6768900319.

It can be divided in two parts, 628711 and 138, that added together give a square (628849 = 793²).

The spelling of 628711138 in words is "six hundred twenty-eight million, seven hundred eleven thousand, one hundred thirty-eight".