628439 has 8 divisors (see below), whose sum is σ = 760608. Its totient is φ = 506880.

The previous prime is 628427. The next prime is 628447. The reversal of 628439 is 934826.

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 628439 - 2⁴ = 628423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2522 + ... + 2759.

It is an arithmetic number, because the mean of its divisors is an integer number (95076).

2⁶²⁸⁴³⁹ is an apocalyptic number.

628439 is a deficient number, since it is larger than the sum of its proper divisors (132169).

628439 is a wasteful number, since it uses less digits than its factorization.

628439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305.

The product of its digits is 10368, while the sum is 32.

The square root of 628439 is about 792.7414458700. The cubic root of 628439 is about 85.6553267822.

The spelling of 628439 in words is "six hundred twenty-eight thousand, four hundred thirty-nine".