442170 has 48 divisors (see below), whose sum is σ = 1221480. Its totient is φ = 110976.

The previous prime is 442157. The next prime is 442171. The reversal of 442170 is 71244.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 370881 + 71289 = 609^2 + 267^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26002 + ... + 26018.

2⁴⁴²¹⁷⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (610740).

442170 is an abundant number, since it is smaller than the sum of its proper divisors (779310).

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

442170 is a wasteful number, since it uses less digits than its factorization.

442170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 442170 is about 664.9586453307. The cubic root of 442170 is about 76.1838806915.

The spelling of 442170 in words is "four hundred forty-two thousand, one hundred seventy", and thus it is an iban number.