442320778 has 16 divisors (see below), whose sum is σ = 672348096. Its totient is φ = 218211840.

The previous prime is 442320757. The next prime is 442320799. The reversal of 442320778 is 877023244.

It is an interprime number because it is at equal distance from previous prime (442320757) and next prime (442320799).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190243 + ... + 192553.

It is an arithmetic number, because the mean of its divisors is an integer number (42021756).

Almost surely, 2^442320778 is an apocalyptic number.

442320778 is a deficient number, since it is larger than the sum of its proper divisors (230027318).

442320778 is a wasteful number, since it uses less digits than its factorization.

442320778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 442320778 is about 21031.4235847220. The cubic root of 442320778 is about 761.9253916201.

The spelling of 442320778 in words is "four hundred forty-two million, three hundred twenty thousand, seven hundred seventy-eight".