628394 has 8 divisors (see below), whose sum is σ = 1015140. Its totient is φ = 290016.

The previous prime is 628391. The next prime is 628399. The reversal of 628394 is 493826.

628394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 619369 + 9025 = 787^2 + 95^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 628394.

It is not an unprimeable number, because it can be changed into a prime (628391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12059 + ... + 12110.

628394 is a Friedman number, since it can be written as 862*9^3-4, using all its digits and the basic arithmetic operations.

2⁶²⁸³⁹⁴ is an apocalyptic number.

628394 is a deficient number, since it is larger than the sum of its proper divisors (386746).

628394 is a wasteful number, since it uses less digits than its factorization.

628394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24184.

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

The square root of 628394 is about 792.7130628418. The cubic root of 628394 is about 85.6532822551.

The spelling of 628394 in words is "six hundred twenty-eight thousand, three hundred ninety-four".