442322440 has 32 divisors (see below), whose sum is σ = 1137401280. Its totient is φ = 151653312.

The previous prime is 442322429. The next prime is 442322449. The reversal of 442322440 is 44223244.

It is not an unprimeable number, because it can be changed into a prime (442322449) 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, 789582 + ... + 790141.

It is an arithmetic number, because the mean of its divisors is an integer number (35543790).

Almost surely, 2^442322440 is an apocalyptic number.

442322440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

442322440 is an abundant number, since it is smaller than the sum of its proper divisors (695078840).

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

442322440 is a wasteful number, since it uses less digits than its factorization.

442322440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579741 (or 1579737 counting only the distinct ones).

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

The square root of 442322440 is about 21031.4630969888. The cubic root of 442322440 is about 761.9263459188.

Adding to 442322440 its reverse (44223244), we get a palindrome (486545684).

The spelling of 442322440 in words is "four hundred forty-two million, three hundred twenty-two thousand, four hundred forty".