628642 has 16 divisors (see below), whose sum is σ = 1092672. Its totient is φ = 265680.

The previous prime is 628591. The next prime is 628651. The reversal of 628642 is 246826.

628642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 628642.

It is an unprimeable number.

628642 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, 892 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (68292).

2⁶²⁸⁶⁴² is an apocalyptic number.

628642 is a deficient number, since it is larger than the sum of its proper divisors (464030).

628642 is a wasteful number, since it uses less digits than its factorization.

628642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633.

The product of its digits is 4608, while the sum is 28.

The square root of 628642 is about 792.8694722336. The cubic root of 628642 is about 85.6645486581.

It can be divided in two parts, 6286 and 42, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 628642 in words is "six hundred twenty-eight thousand, six hundred forty-two".