628923 has 8 divisors (see below), whose sum is σ = 867600. Its totient is φ = 404768.

The previous prime is 628921. The next prime is 628937. The reversal of 628923 is 329826.

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

It is a cyclic number.

It is not a de Polignac number, because 628923 - 2¹ = 628921 is a prime.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (628921) 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 7 ways as a sum of consecutive naturals, for example, 3528 + ... + 3701.

It is an arithmetic number, because the mean of its divisors is an integer number (108450).

2⁶²⁸⁹²³ is an apocalyptic number.

628923 is a deficient number, since it is larger than the sum of its proper divisors (238677).

628923 is a wasteful number, since it uses less digits than its factorization.

628923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7261.

The product of its digits is 5184, while the sum is 30.

The square root of 628923 is about 793.0466568872. The cubic root of 628923 is about 85.6773106394.

It can be divided in two parts, 628 and 923, that added together give a palindrome (1551).

The spelling of 628923 in words is "six hundred twenty-eight thousand, nine hundred twenty-three".