442140 has 24 divisors (see below), whose sum is σ = 1238160. Its totient is φ = 117888.

The previous prime is 442139. The next prime is 442147. The reversal of 442140 is 41244.

442140 = 85² + 86² + ... + 124².

It is a Harshad number since it is a multiple of its sum of digits (15).

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 442140.

It is not an unprimeable number, because it can be changed into a prime (442147) 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, 3625 + ... + 3744.

It is an arithmetic number, because the mean of its divisors is an integer number (51590).

2⁴⁴²¹⁴⁰ is an apocalyptic number.

It is an amenable number.

442140 is an abundant number, since it is smaller than the sum of its proper divisors (796020).

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

442140 is a wasteful number, since it uses less digits than its factorization.

442140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7381 (or 7379 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 442140 is about 664.9360871542. The cubic root of 442140 is about 76.1821576980.

Adding to 442140 its reverse (41244), we get a palindrome (483384).

The spelling of 442140 in words is "four hundred forty-two thousand, one hundred forty", and thus it is an iban number.