442388 has 6 divisors (see below), whose sum is σ = 774186. Its totient is φ = 221192.

The previous prime is 442367. The next prime is 442397. The reversal of 442388 is 883244.

It can be written as a sum of positive squares in only one way, i.e., 407044 + 35344 = 638^2 + 188^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442388.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442388.

It is an unprimeable number.

442388 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 as a sum of consecutive naturals, namely, 55295 + ... + 55302.

It is an arithmetic number, because the mean of its divisors is an integer number (129031).

2⁴⁴²³⁸⁸ is an apocalyptic number.

It is an amenable number.

442388 is a deficient number, since it is larger than the sum of its proper divisors (331798).

442388 is a wasteful number, since it uses less digits than its factorization.

442388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110601 (or 110599 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 442388 is about 665.1225450998. The cubic root of 442388 is about 76.1963987708.

The spelling of 442388 in words is "four hundred forty-two thousand, three hundred eighty-eight".