442628 has 12 divisors (see below), whose sum is σ = 779520. Its totient is φ = 219912.

The previous prime is 442619. The next prime is 442633. The reversal of 442628 is 826244.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 442597 and 442606.

It is an unprimeable number.

442628 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 3 ways as a sum of consecutive naturals, for example, 725 + ... + 1187.

It is an arithmetic number, because the mean of its divisors is an integer number (64960).

2⁴⁴²⁶²⁸ is an apocalyptic number.

It is an amenable number.

442628 is a deficient number, since it is larger than the sum of its proper divisors (336892).

442628 is a wasteful number, since it uses less digits than its factorization.

442628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 704 counting only the distinct ones).

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

The square root of 442628 is about 665.3029385175. The cubic root of 442628 is about 76.2101753874.

The spelling of 442628 in words is "four hundred forty-two thousand, six hundred twenty-eight".