628907 has 4 divisors (see below), whose sum is σ = 642336. Its totient is φ = 615480.

The previous prime is 628877. The next prime is 628909. The reversal of 628907 is 709826.

628907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628907 - 2⁸ = 628651 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (628909) 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, 6644 + ... + 6737.

It is an arithmetic number, because the mean of its divisors is an integer number (160584).

2⁶²⁸⁹⁰⁷ is an apocalyptic number.

628907 is a deficient number, since it is larger than the sum of its proper divisors (13429).

628907 is a wasteful number, since it uses less digits than its factorization.

628907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13428.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 628907 is about 793.0365691442. The cubic root of 628907 is about 85.6765840807.

The spelling of 628907 in words is "six hundred twenty-eight thousand, nine hundred seven".