442423240 has 64 divisors (see below), whose sum is σ = 1156354560. Its totient is φ = 149195520.

The previous prime is 442423237. The next prime is 442423253. The reversal of 442423240 is 42324244.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4129 + ... + 30031.

It is an arithmetic number, because the mean of its divisors is an integer number (18068040).

Almost surely, 2^442423240 is an apocalyptic number.

442423240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 442423240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578177280).

442423240 is an abundant number, since it is smaller than the sum of its proper divisors (713931320).

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

442423240 is a wasteful number, since it uses less digits than its factorization.

442423240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25982 (or 25978 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 442423240 is about 21033.8593700728. The cubic root of 442423240 is about 761.9842194935.

Adding to 442423240 its reverse (42324244), we get a palindrome (484747484).

The spelling of 442423240 in words is "four hundred forty-two million, four hundred twenty-three thousand, two hundred forty".