442381378 has 32 divisors (see below), whose sum is σ = 712454400. Its totient is φ = 205286400.

The previous prime is 442381363. The next prime is 442381393. The reversal of 442381378 is 873183244.

It is an interprime number because it is at equal distance from previous prime (442381363) and next prime (442381393).

It is a self number, because there is not a number n which added to its sum of digits gives 442381378.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1021450 + ... + 1021882.

It is an arithmetic number, because the mean of its divisors is an integer number (22264200).

Almost surely, 2^442381378 is an apocalyptic number.

442381378 is a deficient number, since it is larger than the sum of its proper divisors (270073022).

442381378 is a wasteful number, since it uses less digits than its factorization.

442381378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802.

The product of its digits is 129024, while the sum is 40.

The square root of 442381378 is about 21032.8642367130. The cubic root of 442381378 is about 761.9601858031.

The spelling of 442381378 in words is "four hundred forty-two million, three hundred eighty-one thousand, three hundred seventy-eight".