442720842 has 16 divisors (see below), whose sum is σ = 887654592. Its totient is φ = 147204800.

The previous prime is 442720771. The next prime is 442720849. The reversal of 442720842 is 248027244.

It is a super-3 number, since 3×442720842³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (442720849) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 89598 + ... + 94409.

It is an arithmetic number, because the mean of its divisors is an integer number (55478412).

Almost surely, 2^442720842 is an apocalyptic number.

442720842 is an abundant number, since it is smaller than the sum of its proper divisors (444933750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

442720842 is a wasteful number, since it uses less digits than its factorization.

442720842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184413.

The product of its (nonzero) digits is 28672, while the sum is 33.

The square root of 442720842 is about 21040.9325363682. The cubic root of 442720842 is about 762.1550342096.

The spelling of 442720842 in words is "four hundred forty-two million, seven hundred twenty thousand, eight hundred forty-two".