442649 has 8 divisors (see below), whose sum is σ = 464640. Its totient is φ = 421200.

The previous prime is 442633. The next prime is 442691. The reversal of 442649 is 946244.

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 442649 - 2⁴ = 442633 is a prime.

It is a d-powerful number, because it can be written as 4⁵ + 4⁵ + 6⁶ + 2¹⁷ + 4⁹ + 9³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442609) 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, 3314 + ... + 3444.

It is an arithmetic number, because the mean of its divisors is an integer number (58080).

2⁴⁴²⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

442649 is a deficient number, since it is larger than the sum of its proper divisors (21991).

442649 is a wasteful number, since it uses less digits than its factorization.

442649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271.

The product of its digits is 6912, while the sum is 29.

The square root of 442649 is about 665.3187206144. The cubic root of 442649 is about 76.2113806044.

The spelling of 442649 in words is "four hundred forty-two thousand, six hundred forty-nine".