628726 has 8 divisors (see below), whose sum is σ = 1077840. Its totient is φ = 269448.

The previous prime is 628721. The next prime is 628753. The reversal of 628726 is 627826.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628721) 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 3 ways as a sum of consecutive naturals, for example, 22441 + ... + 22468.

It is an arithmetic number, because the mean of its divisors is an integer number (134730).

2⁶²⁸⁷²⁶ is an apocalyptic number.

628726 is a deficient number, since it is larger than the sum of its proper divisors (449114).

628726 is a wasteful number, since it uses less digits than its factorization.

628726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44918.

The product of its digits is 8064, while the sum is 31.

The square root of 628726 is about 792.9224426134. The cubic root of 628726 is about 85.6683640260.

Subtracting from 628726 its reverse (627826), we obtain a square (900 = 30²).

The spelling of 628726 in words is "six hundred twenty-eight thousand, seven hundred twenty-six".