628239 has 8 divisors (see below), whose sum is σ = 851632. Its totient is φ = 411840.

The previous prime is 628231. The next prime is 628261. The reversal of 628239 is 932826.

628239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 628239 - 2³ = 628231 is a prime.

It is a super-2 number, since 2×628239² = 789368482242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628231) 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, 1534 + ... + 1899.

It is an arithmetic number, because the mean of its divisors is an integer number (106454).

2⁶²⁸²³⁹ is an apocalyptic number.

628239 is a deficient number, since it is larger than the sum of its proper divisors (223393).

628239 is a wasteful number, since it uses less digits than its factorization.

628239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497.

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

The square root of 628239 is about 792.6152912984. The cubic root of 628239 is about 85.6462392478.

The spelling of 628239 in words is "six hundred twenty-eight thousand, two hundred thirty-nine".