628697 has 4 divisors (see below), whose sum is σ = 633360. Its totient is φ = 624036.

The previous prime is 628687. The next prime is 628699. The reversal of 628697 is 796826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 628697 - 2⁴ = 628681 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 628697.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628697.

It is not an unprimeable number, because it can be changed into a prime (628699) 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, 2123 + ... + 2400.

It is an arithmetic number, because the mean of its divisors is an integer number (158340).

2⁶²⁸⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

628697 is a deficient number, since it is larger than the sum of its proper divisors (4663).

628697 is a wasteful number, since it uses less digits than its factorization.

628697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4662.

The product of its digits is 36288, while the sum is 38.

The square root of 628697 is about 792.9041556203. The cubic root of 628697 is about 85.6670468541.

The spelling of 628697 in words is "six hundred twenty-eight thousand, six hundred ninety-seven".