442870 has 16 divisors (see below), whose sum is σ = 810288. Its totient is φ = 174240.

The previous prime is 442861. The next prime is 442879. The reversal of 442870 is 78244.

442870 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (442861) and next prime (442879).

It is a super-2 number, since 2×442870² = 392267673800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340 + ... + 1000.

It is an arithmetic number, because the mean of its divisors is an integer number (50643).

2⁴⁴²⁸⁷⁰ is an apocalyptic number.

442870 is a deficient number, since it is larger than the sum of its proper divisors (367418).

442870 is a wasteful number, since it uses less digits than its factorization.

442870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735.

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

The square root of 442870 is about 665.4847857014. The cubic root of 442870 is about 76.2240617678.

The spelling of 442870 in words is "four hundred forty-two thousand, eight hundred seventy".