442378 has 8 divisors (see below), whose sum is σ = 666468. Its totient is φ = 220224.

The previous prime is 442367. The next prime is 442397. The reversal of 442378 is 873244.

It can be written as a sum of positive squares in 2 ways, for example, as 439569 + 2809 = 663^2 + 53^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 4⁵ + 4⁹ + 3¹¹ + 2¹¹ + 7 + 8 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450 + ... + 1042.

2⁴⁴²³⁷⁸ is an apocalyptic number.

442378 is a deficient number, since it is larger than the sum of its proper divisors (224090).

442378 is a wasteful number, since it uses less digits than its factorization.

442378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968.

The product of its digits is 5376, while the sum is 28.

The square root of 442378 is about 665.1150276456. The cubic root of 442378 is about 76.1958246369.

It can be divided in two parts, 442 and 378, that added together give a triangular number (820 = T₄₀).

The spelling of 442378 in words is "four hundred forty-two thousand, three hundred seventy-eight".