442387 has 8 divisors (see below), whose sum is σ = 487872. Its totient is φ = 397800.

The previous prime is 442367. The next prime is 442397. The reversal of 442387 is 783244.

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

It is a cyclic number.

It is not a de Polignac number, because 442387 - 2¹¹ = 440339 is a prime.

442387 is a lucky number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (442327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288 + ... + 1594.

It is an arithmetic number, because the mean of its divisors is an integer number (60984).

2⁴⁴²³⁸⁷ is an apocalyptic number.

442387 is a deficient number, since it is larger than the sum of its proper divisors (45485).

442387 is a wasteful number, since it uses less digits than its factorization.

442387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449.

The product of its digits is 5376, while the sum is 28.

The square root of 442387 is about 665.1217933582. The cubic root of 442387 is about 76.1963413578.

The spelling of 442387 in words is "four hundred forty-two thousand, three hundred eighty-seven".