628442 has 8 divisors (see below), whose sum is σ = 948000. Its totient is φ = 312444.

The previous prime is 628427. The next prime is 628447. The reversal of 628442 is 244826.

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392 + ... + 1187.

It is an arithmetic number, because the mean of its divisors is an integer number (118500).

2⁶²⁸⁴⁴² is an apocalyptic number.

628442 is a deficient number, since it is larger than the sum of its proper divisors (319558).

628442 is a wasteful number, since it uses less digits than its factorization.

628442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780.

The product of its digits is 3072, while the sum is 26.

The square root of 628442 is about 792.7433380357. The cubic root of 628442 is about 85.6554630805.

The spelling of 628442 in words is "six hundred twenty-eight thousand, four hundred forty-two".