628670 has 24 divisors (see below), whose sum is σ = 1317384. Its totient is φ = 215376.

The previous prime is 628651. The next prime is 628673. The reversal of 628670 is 76826.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628673) by changing a digit.

628670 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (54891).

2⁶²⁸⁶⁷⁰ is an apocalyptic number.

628670 is an abundant number, since it is smaller than the sum of its proper divisors (688714).

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

628670 is a wasteful number, since it uses less digits than its factorization.

628670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 628670 is about 792.8871294201. The cubic root of 628670 is about 85.6658204852.

The spelling of 628670 in words is "six hundred twenty-eight thousand, six hundred seventy".