628390 has 32 divisors (see below), whose sum is σ = 1327104. Its totient is φ = 209760.

The previous prime is 628379. The next prime is 628391. The reversal of 628390 is 93826.

628390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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

628390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3195 + ... + 3385.

It is an arithmetic number, because the mean of its divisors is an integer number (41472).

2⁶²⁸³⁹⁰ is an apocalyptic number.

628390 is an abundant number, since it is smaller than the sum of its proper divisors (698714).

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

628390 is a wasteful number, since it uses less digits than its factorization.

628390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 628390 is about 792.7105398568. The cubic root of 628390 is about 85.6531005146.

The spelling of 628390 in words is "six hundred twenty-eight thousand, three hundred ninety".