442778 has 8 divisors (see below), whose sum is σ = 759072. Its totient is φ = 189756.

The previous prime is 442777. The next prime is 442781. The reversal of 442778 is 877244.

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

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (442777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15800 + ... + 15827.

It is an arithmetic number, because the mean of its divisors is an integer number (94884).

2⁴⁴²⁷⁷⁸ is an apocalyptic number.

442778 is a deficient number, since it is larger than the sum of its proper divisors (316294).

442778 is a wasteful number, since it uses less digits than its factorization.

442778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31636.

The product of its digits is 12544, while the sum is 32.

The square root of 442778 is about 665.4156595693. The cubic root of 442778 is about 76.2187832442.

The spelling of 442778 in words is "four hundred forty-two thousand, seven hundred seventy-eight".