442923 has 16 divisors (see below), whose sum is σ = 653856. Its totient is φ = 264960.

The previous prime is 442919. The next prime is 442961. The reversal of 442923 is 329244.

It is a happy number.

It is not a de Polignac number, because 442923 - 2² = 442919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442893 and 442902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1461 + ... + 1737.

It is an arithmetic number, because the mean of its divisors is an integer number (40866).

2⁴⁴²⁹²³ is an apocalyptic number.

442923 is a deficient number, since it is larger than the sum of its proper divisors (210933).

442923 is a wasteful number, since it uses less digits than its factorization.

442923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334.

The product of its digits is 1728, while the sum is 24.

The square root of 442923 is about 665.5246051049. The cubic root of 442923 is about 76.2271023246.

The spelling of 442923 in words is "four hundred forty-two thousand, nine hundred twenty-three".