628278 has 24 divisors (see below), whose sum is σ = 1462392. Its totient is φ = 179424.

The previous prime is 628267. The next prime is 628289. The reversal of 628278 is 872826.

628278 is nontrivially palindromic in base 13.

628278 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (628267) and next prime (628289).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775 + ... + 1362.

It is an arithmetic number, because the mean of its divisors is an integer number (60933).

2⁶²⁸²⁷⁸ is an apocalyptic number.

628278 is an abundant number, since it is smaller than the sum of its proper divisors (834114).

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

628278 is a wasteful number, since it uses less digits than its factorization.

628278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156 (or 2149 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 628278 is about 792.6398930157. The cubic root of 628278 is about 85.6480114684.

It can be divided in two parts, 62827 and 8, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 628278 in words is "six hundred twenty-eight thousand, two hundred seventy-eight".