628520 has 32 divisors (see below), whose sum is σ = 1490400. Its totient is φ = 237888.

The previous prime is 628499. The next prime is 628547. The reversal of 628520 is 25826.

It is a happy number.

It is an unprimeable number.

628520 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 7 ways as a sum of consecutive naturals, for example, 347 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (46575).

2⁶²⁸⁵²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745200).

628520 is an abundant number, since it is smaller than the sum of its proper divisors (861880).

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

628520 is a wasteful number, since it uses less digits than its factorization.

628520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 628520 is about 792.7925327600. The cubic root of 628520 is about 85.6590066850.

The spelling of 628520 in words is "six hundred twenty-eight thousand, five hundred twenty".