628434 has 12 divisors (see below), whose sum is σ = 1361646. Its totient is φ = 209472.

The previous prime is 628427. The next prime is 628447. The reversal of 628434 is 434826.

628434 is a `hidden beast` number, since 628 + 4 + 34 = 666.

628434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 540225 + 88209 = 735^2 + 297^2 .

It is a junction number, because it is equal to n+sod(n) for n = 628398 and 628407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17439 + ... + 17474.

2⁶²⁸⁴³⁴ is an apocalyptic number.

628434 is an abundant number, since it is smaller than the sum of its proper divisors (733212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628434 is a wasteful number, since it uses less digits than its factorization.

628434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34921 (or 34918 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 628434 is about 792.7382922503. The cubic root of 628434 is about 85.6550996173.

The spelling of 628434 in words is "six hundred twenty-eight thousand, four hundred thirty-four".