628706 has 8 divisors (see below), whose sum is σ = 1015644. Its totient is φ = 290160.

The previous prime is 628699. The next prime is 628709. The reversal of 628706 is 607826.

It can be written as a sum of positive squares in 2 ways, for example, as 625681 + 3025 = 791^2 + 55^2 .

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628706.

It is not an unprimeable number, because it can be changed into a prime (628709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12065 + ... + 12116.

2⁶²⁸⁷⁰⁶ is an apocalyptic number.

628706 is a deficient number, since it is larger than the sum of its proper divisors (386938).

628706 is a wasteful number, since it uses less digits than its factorization.

628706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24196.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 628706 is about 792.9098309392. The cubic root of 628706 is about 85.6674556359.

The spelling of 628706 in words is "six hundred twenty-eight thousand, seven hundred six".