442637 has 8 divisors (see below), whose sum is σ = 483840. Its totient is φ = 402480.

The previous prime is 442633. The next prime is 442691. The reversal of 442637 is 736244.

It is a happy number.

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

It is not a de Polignac number, because 442637 - 2² = 442633 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 (442633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812 + ... + 1242.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁴⁴²⁶³⁷ is an apocalyptic number.

It is an amenable number.

442637 is a deficient number, since it is larger than the sum of its proper divisors (41203).

442637 is a wasteful number, since it uses less digits than its factorization.

442637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523.

The product of its digits is 4032, while the sum is 26.

The square root of 442637 is about 665.3097023192. The cubic root of 442637 is about 76.2106919137.

The spelling of 442637 in words is "four hundred forty-two thousand, six hundred thirty-seven".