442387503 has 12 divisors (see below), whose sum is σ = 656275048. Its totient is φ = 286953840.

The previous prime is 442387501. The next prime is 442387511. The reversal of 442387503 is 305783244.

It is a happy number.

It is not a de Polignac number, because 442387503 - 2¹ = 442387501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442387501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663913 + ... + 664578.

Almost surely, 2^442387503 is an apocalyptic number.

442387503 is a deficient number, since it is larger than the sum of its proper divisors (213887545).

442387503 is a wasteful number, since it uses less digits than its factorization.

442387503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328534 (or 1328531 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 442387503 is about 21033.0098416751. The cubic root of 442387503 is about 761.9637023651.

The spelling of 442387503 in words is "four hundred forty-two million, three hundred eighty-seven thousand, five hundred three".