628386 has 16 divisors (see below), whose sum is σ = 1371168. Its totient is φ = 190400.

The previous prime is 628379. The next prime is 628391. The reversal of 628386 is 683826.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4695 + ... + 4826.

It is an arithmetic number, because the mean of its divisors is an integer number (85698).

2⁶²⁸³⁸⁶ is an apocalyptic number.

628386 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

628386 is an abundant number, since it is smaller than the sum of its proper divisors (742782).

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

628386 is a wasteful number, since it uses less digits than its factorization.

628386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9537.

The product of its digits is 13824, while the sum is 33.

The square root of 628386 is about 792.7080168637. The cubic root of 628386 is about 85.6529187734.

It can be divided in two parts, 62 and 8386, that added together give a palindrome (8448).

The spelling of 628386 in words is "six hundred twenty-eight thousand, three hundred eighty-six".