628929 has 24 divisors (see below), whose sum is σ = 1060800. Its totient is φ = 351648.

The previous prime is 628921. The next prime is 628937. The reversal of 628929 is 929826.

628929 is a `hidden beast` number, since 628 + 9 + 29 = 666.

It is an interprime number because it is at equal distance from previous prime (628921) and next prime (628937).

It is not a de Polignac number, because 628929 - 2³ = 628921 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 628893 and 628902.

It is not an unprimeable number, because it can be changed into a prime (628921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4147 + ... + 4295.

It is an arithmetic number, because the mean of its divisors is an integer number (44200).

2⁶²⁸⁹²⁹ is an apocalyptic number.

It is an amenable number.

628929 is a deficient number, since it is larger than the sum of its proper divisors (431871).

628929 is a wasteful number, since it uses less digits than its factorization.

628929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 226 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 628929 is about 793.0504397578. The cubic root of 628929 is about 85.6775830958.

The spelling of 628929 in words is "six hundred twenty-eight thousand, nine hundred twenty-nine".