628430 has 32 divisors (see below), whose sum is σ = 1283040. Its totient is φ = 219520.

The previous prime is 628427. The next prime is 628447. The reversal of 628430 is 34826.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 628396 and 628405.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3092 + ... + 3288.

It is an arithmetic number, because the mean of its divisors is an integer number (40095).

2⁶²⁸⁴³⁰ is an apocalyptic number.

628430 is an abundant number, since it is smaller than the sum of its proper divisors (654610).

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

628430 is a wasteful number, since it uses less digits than its factorization.

628430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 628430 is about 792.7357693456. The cubic root of 628430 is about 85.6549178846.

The spelling of 628430 in words is "six hundred twenty-eight thousand, four hundred thirty".