442780 has 36 divisors (see below), whose sum is σ = 1014552. Its totient is φ = 162240.

The previous prime is 442777. The next prime is 442781. The reversal of 442780 is 87244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442781) 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, 3315 + ... + 3445.

It is an arithmetic number, because the mean of its divisors is an integer number (28182).

2⁴⁴²⁷⁸⁰ 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 442780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507276).

442780 is an abundant number, since it is smaller than the sum of its proper divisors (571772).

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

442780 is a wasteful number, since it uses less digits than its factorization.

442780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 442780 is about 665.4171623876. The cubic root of 442780 is about 76.2188980025.

The spelling of 442780 in words is "four hundred forty-two thousand, seven hundred eighty".