442776 has 32 divisors (see below), whose sum is σ = 1166400. Its totient is φ = 139680.

The previous prime is 442769. The next prime is 442777. The reversal of 442776 is 677244.

It is a nialpdrome in base 9.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 442776.

It is not an unprimeable number, because it can be changed into a prime (442777) by changing a digit.

442776 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30 + ... + 941.

It is an arithmetic number, because the mean of its divisors is an integer number (36450).

2⁴⁴²⁷⁷⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583200).

442776 is an abundant number, since it is smaller than the sum of its proper divisors (723624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442776 is a wasteful number, since it uses less digits than its factorization.

442776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999 (or 995 counting only the distinct ones).

The product of its digits is 9408, while the sum is 30.

The square root of 442776 is about 665.4141567475. The cubic root of 442776 is about 76.2186684855.

The spelling of 442776 in words is "four hundred forty-two thousand, seven hundred seventy-six".