628445 has 16 divisors (see below), whose sum is σ = 802560. Its totient is φ = 471744.

The previous prime is 628427. The next prime is 628447. The reversal of 628445 is 544826.

It is a cyclic number.

It is not a de Polignac number, because 628445 - 2⁸ = 628189 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628445.

It is not an unprimeable number, because it can be changed into a prime (628447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7916 + ... + 7994.

It is an arithmetic number, because the mean of its divisors is an integer number (50160).

2⁶²⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

628445 is a deficient number, since it is larger than the sum of its proper divisors (174115).

628445 is a wasteful number, since it uses less digits than its factorization.

628445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164.

The product of its digits is 7680, while the sum is 29.

The square root of 628445 is about 792.7452301969. The cubic root of 628445 is about 85.6555993784.

The spelling of 628445 in words is "six hundred twenty-eight thousand, four hundred forty-five".