628703 has 4 divisors (see below), whose sum is σ = 643368. Its totient is φ = 614040.

The previous prime is 628699. The next prime is 628709. The reversal of 628703 is 307826.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 307826 = 2 ⋅153913.

It is not a de Polignac number, because 628703 - 2² = 628699 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628703.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7268 + ... + 7353.

It is an arithmetic number, because the mean of its divisors is an integer number (160842).

2⁶²⁸⁷⁰³ is an apocalyptic number.

628703 is a deficient number, since it is larger than the sum of its proper divisors (14665).

628703 is a wasteful number, since it uses less digits than its factorization.

628703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14664.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 628703 is about 792.9079391707. The cubic root of 628703 is about 85.6673193758.

It can be divided in two parts, 628 and 703, that added together give a palindrome (1331).

The spelling of 628703 in words is "six hundred twenty-eight thousand, seven hundred three".